Egg Freezing, which is also known as mature oocyte cryopreservation, refers to the method through which reproductive potential is restored among women. Eggs get harvested from the ovaries, frozen and in an unfertilized manner and are stored for purpose of using them later on. The egg freezing procedure is recommended for those women, who would like to delay conceiving baby due to various kinds of reasons.

Before the freezing of eggs, it is important to first retrieve the eggs. Let us look at how the eggs are retrieved, followed by the procedure of egg freezing through two different ways.

Retrieval of Egg

Egg Retrieval takes place just like it is done in case of in vitro fertilization (IVF). Women would need to be put under medication for hormones or through injections, which shall lead to the stimulation of ovaries, leading to more eggs getting matured. After this women would receive the necessary medication to stimulate ovulation and then the extraction of eggs takes place through the use of a needle. Specialists perform this whole procedure by putting women under the effect of anesthesia and are also guided by ultrasounds. Once the extraction is completed, the freezing takes place.

There are two different techniques involved in the egg freezing process. They include:

Slow Egg Freezing Method

A substance called cryoprotectant is used in order to protect the biological tissues from getting damaged out of freezing. This slow freezing method of getting eggs freezed relies on low initial concentrations of crytoprotectant. The cryoprotectant in low concentration is introduced when the egg is at a relatively warm temperature and still continues to experience the usual functions of a living cell. Then the cryptoprotectant would spread all throughtout thus fill the egg, hence replacing most of the water inside the egg. The egg is then inserted into a small container made of plastic and ultimately get placed inside a cooling chamber. The lowering of temperature, to around -6 degree centigrade, takes place through injecting very tiny amounts of liquid nitrogen into the cooling chamber. The cooling process is controlled by a computer.

The main purpose of these techniques is to avoid ice crystals from getting formed in the egg. During the spreading of the cryoprotectant, if the ice crystals are still present, they can cause damage to the egg and hence the egg may not survive the process of thawing. Then the temperature is lowered further to around -32 degree centigrade. By this time, the egg s metabolic rate become slow. The container where the egg was placed, is then dipped inside the liquid nitrogen, forming a solid.

Rapid Egg Freezing Method or Vitrification

At the time of rapid freezing method, there is high concentration of initial cryoprotectant whereas the cell remains at room temperature. The egg is unable to stay for long in this temperature and thus gets poured immediately onto the liquid nitrogen. Cryoprotectant spreads at a rapid rate so as to avoid ice-crystal from getting damaged. Vitrification is a very new method for freeing eggs. Recent research has shown that vitrification of eggs largely improves the possibility for survival after thawing and the rates of pregnancy.

Different Techniques That Can Be Used For Egg Freezing!

What are the factors that make a woman fertile? + The most effective way to address infertility

Infertility is the inability to get pregnant after a year of unprotected intercourse. Both men and women can be infertile.

In about one-third of cases, the cause of infertility involves only the male.

In about one-third of cases, the cause of infertility involves only the female.

In the remaining cases, the cause of infertility involves both the male and female or no cause can be identified.

Women are born with a finite number of eggs. Thus, as the reproductive years progress, the number and quality of the eggs diminish. The chances of having a baby decrease by 3% to 5% per year after the age of 30 and this reduction is noted to a much greater extent after age 40.

Female infertility can also be caused by a number of factors including:

1. Damage to fallopian tubes

Damage to the fallopian tubes can prevent contact between the egg and sperm. Pelvic infections, endometriosis, and pelvic surgeries can lead to fallopian tube damage.

2. Hormonal causes

This can lead to ovulation disorders which prevent the ovaries from releasing eggs such as in polycystic ovary syndrome ,  hyperprolactinemia or disorders of the thyroid gland - hyperthyroidism / hypothyroidism, can interrupt the menstrual cycle and cause infertility.

3. Cervical causes

A small group of women may have a problem in which the sperm cannot pass through the cervical canal. Whatever the reason is , this problem may be treated with intrauterine inseminations.

4. Uterine causes

Abnormal anatomy and distortion of the uterine cavity due to the presence of polyps and fibroids or problem with the endometrial lining can lead to failed implantation of the embryo.

Endometriosis occurs when endometrial tissue grows outside the uterus - often affecting the function of the ovaries, uterus, and fallopian tubes.

5. Primary Ovarian Insufficiency:

Also called as Premature Menopause, when the ovaries stop working prematurely before the age of 40. Certain conditions are associated with early menopause like immune system diseases, radiation or chemotherapy and smoking.

Causes of male infertility may include:

1. Abnormal sperm production or function due to various problems, such as undescended testicles, genetic defects, health problems including diabetes, prior infections such as mumps, trauma or prior surgeries on the testicles or inguinal region.

2. Problems with the delivery of sperm, due to sexual problems, such as premature or retrograde ejaculation, certain genetic diseases, such as cystic fibrosis, structural problems, such as blockage of the epididymis, or damage to the reproductive organs.

3. Overexposure to certain chemicals and toxins, such as pesticides, radiation, tobacco smoke, alcohol, frequent exposure to heat can elevate the testicular temperature, impairing sperm production.

4. Damage related to cancer and its treatment, including radiation or chemotherapy for which timely cryopreservation can be done for future use.

5. Unexplained infertility, In approximately 20% of couples the cause cannot be determined using the currently available methods of investigation.

Why is IVF the best way to treat infertility in women?

Conception is a complicated process that depends on upon many factors:

On the production of healthy sperm by the man and healthy eggs by the woman

The sperm's ability to fertilize the egg when they meet.

The ability of the fertilized egg (embryo) to become implanted in the woman's uterus

IVF (or in-vitro fertilization) is a lab procedure where the sperm and the egg are combined in a dish (where fertilization takes place) and is followed by transferring the embryo (the fertilized egg) into the uterus. It is increasingly being used as a method to conceive as it has been established as a safe procedure that helps bypass a number of complications women may face while conceiving such as ovulation problems and issues with the fallopian tube.

Even women who face issues such as PCOS, endometriosis, and premature ovarian failure can conceive through this process. Moreover, IVF has been in practice since 1978 and has a safe track record. The success rates of IVF are high as well, making it a preferred procedure for couples who suffer from fertility problems. Unexplained infertility can also be treated with the help of this procedure.



What factors that  make a woman fertile? + The most effective way to address infertility

Factors that determine the success of your IVF procedure

IVF or In Vitro Fertilization is a process wherein an egg is fertilized by a sperm in a laboratory dish to form the embryo (baby's first cell) which after growth in artificial medium in the lab is transferred into the uterus of women, In general, a blood sample is collected to determine whether you're pregnant or not about 10-14 days after the eggs are retrieved.

Coming to the success of the procedure, a number of factors are at play and these are:

The age at which you get pregnant

A factor that plays a role in influencing your chances of experiencing success in your IVF procedure is the age at which you opt for this procedure. The lower your age, the chances that you may get pregnant and deliver a healthy child using your own eggs witness an increase. On the other hand, if you're aged 41 and above, or your egg reserve is very low donor eggs are the most preferred option as they help to increase your prospects of meeting a success.

Lifestyle habits

Certain lifestyle factors can significantly affect your prospects of getting pregnant through this route. Smoking can reduce your prospect of success using this procedure by about 50%. It can cause you to have lesser number of eggs retrieved during the procedure while increasing instances of miscarriages. Likewise, obesity, alcohol use, consumption of excessive caffeine and drugs can adversely affect your chances of getting pregnant using IVF.

Cause of Infertility

If your supply of eggs is normal, success rate using IVF is high. Women who suffer from the problem of endometriosis experience lesser chances of getting pregnant than women who have unexplained fertility.

Reproductive history

IVF success rate chances are higher if you've delivered a baby previously using IVF.

Embryo status

Embryos that are better developed with good grade stand a higher chance of experiencing success than less developed embryos. More importantly, not every embryo is able to survive the development process.



What are the factors that determine the success of your IVF procedure?

Intracytoplasmic Sperm Injection i.e. ICSI is different from conventional IVF i.e. In Vitro Fertilization because a single sperm is selected by the embryologist to be injected by a needle into the egg rather than a dish with many sperms placed near the egg so that the fastest swimming sperm enters it. Once the sperm is injected directly into the egg, it fertilizes, after which the embryo is transferred into the womb or uterus. 

Your doctor might recommend ICSI treatment for you if you have an extremely low sperm count resulting in infertility or other medical sperm conditions such as poor motility or poor morphology. It may also be suggested if prior attempts at IVF procedures have failed in fertilizing the egg or the fertilization rate is extremely low. You must also consider ICSI treatment if you resort to embryo testing or if the sperm needs to be collected from the epididymis or testicles surgically. 

However, you must keep in mind that if your partner has a genetic problem resulting in low sperm count, it could be passed on to your child, if you decide to use your husband's sperm for this process.

Success Rates of ICSI:
The success rate of ICSI treatment depends on your age and your fertility problem. Your eggs are healthier when you are young and as you age, chances are that they will become less healthy.
1. 35 per cent if you are under 35 years of age
2. 29 per cent if you are between 35 to 37 years of age
3. 21 per cent if you are between 38 to 39 years of age
4. 14 per cent if you are between 40 to 42 years of age
5. 6 per cent if you are between 43 to 44 years of age
6. 5 per cent if you are above 44 years of age

Advantages of ICSI Treatment:
Intracytoplasmic Sperm Injection gives you a chance to conceive a child genetically when most other options are exhausted. Males may be unable to ejaculate on the day the eggs are collected due to anxiety. ICSI proves to be advantageous because sperm may also be surgically extracted for this process. It is extremely helpful for those couples who suffer from unexplained infertility. However, one of the most important factors is that ICSI treatment does not affect your child's physical or mental health.

Intracytoplasmic Sperm Injection (ICSI)

When a childless couple is not able to conceive, there are myriad paths that the couple may follow to obtain a solution. If IVF does not help the couple, then they can go in for surrogacy. In this method, another lady conceives, carries and gives birth to the baby created by the sperm and eggs of the intended parents. Let us find out more about surrogacy today.

Who can use it?
Surrogacy can be availed by couples who are not able to conceive due to many conclusive reasons including the absence of a womb or the malfunctioning of the same. Also, recurrent miscarriages can be one of the reasons. Further, a couple who has been through IVF or In Vitro Fertilisation implantation failure a number of times can opt for surrogacy.

How does it Work?
Full surrogacy, as it is known, is a process of implanting an embryo in a host body. This embryo is usually created using the egg and the sperm of the parents, or even a fertilised egg that has been donated by a donor, which is then fertilised using the sperm from the intended father. Also, this embryo may be created by using donor eggs and donor sperms. Partial surrogacy is also a method that may be used. When artificial insemination or intrauterine insemination (IUI) is used to create an embryo with the sperm from the intended father and the egg from the surrogate mother, then the process is known as partial surrogacy.

Chance of having a baby with surrogacy
The chance of having a baby with surrogacy depend on various factors. It depends on the ability of the surrogate to get pregnant, as well as her overall health. Before choosing a surrogate, it is important to put her through all the necessary tests to ascertain a good state of health. Further, the age of the egg donor is also a factor in such cases. The success of related procedures like IVF or IUI will also determine the chances of conception through this method. Furthermore, the quality of the elements used by the couple or the intended parents will also make a difference to the process and its efficacy. Yet, the most important factor includes the age of the woman whose egg is being used.

Difference between IVF and Surrogacy
In IVF, the eggs are gathered from the woman and the sperm is taken from her partner before an embryo is created and affixed in the uterus of the intended mother. In surrogacy, it is actually another woman who carries this lab-created embryo through methods like artificial insemination. The sperm may come from the father and the egg may be donated by someone else, in many cases involving full or partial surrogacy.

What is Surrogacy and how it is different from IVF

It is as important for the man as it is for the woman to undergo certain tests before the IVF cycle is started. Fertility is not only an issue for a woman, but it also might be for the man in question. There are certain tests that need to be conducted on men before they can gear up for IVF:

1. Semen Analysis: One of the most important tests for male infertility is semen analysis. Sometimes, a man may be completely healthy, but his sperm production could be of poor quality. Semen analysis is done to provide an accurate evaluation of sperm number, the ability to move (motility), size and shape (morphology), as well as the consistency and volume of the sample collected.

2. Binding Test: Sometimes agglutination occurs where the sperms might stick to each other by their heads or tails. Sperm antibodies might cause this problem. The IVF treatment's success might be compromised if this happens. A simple binding test is done to determine this.

3. Trial Wash: This is also known as sperm wash. It is mostly done to remove chemicals from the sperm. Not doing a sperm wash might end up affecting the later stages of the IVF treatment. In this process, the misshapen and immotile sperm is separated so a clean sample of motile and healthy sperm can be collected.

4. TUNEL Assay: Since sperms build up about half of a child's genetic makeup, a TUNEL Assay or 'sperm DNA test' is required. This test is done to measure the sperm population that have fragmented DNA. Negative impacts on genetics can hamper the success of the fertility treatment.

TUNEL Assay is usually recommended to men with:
a) Leukocytes detected by the sperm analysis
b) Age approaching 50
c) A history of diabetes II type or prostatitis
d) Exposure to chemicals or prolonged heat at workplaces

5. Screening for Infectious Diseases: This test is done for both the partners to check for diseases like AIDS, Hepatitis C, and so on.

Tests Suggested for Men Before IVF

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