In Vitro Fertilization is a commonly used fertility technique. It involves harvesting the eggs from the mother during an outpatient surgical procedure. These are later fertilized by the father’s sperm in a laboratory setting using intracytoplasmic sperm injection. However, only one embryo is introduced into the mother’s uterus. Multiple fertilized embryos are not implanted at the same time in order to avoid the risk of multiple pregnancies. The remaining embryos are kept in stasis and can be thawed for using later if the initial embryo failed to implant. Hence they are frozen in liquid nitrogen and stored below freezing point in a carefully controlled environment.
Frozen embryo transfer success rates are equal to that of fresh embryo transfer rates in women who are successful candidates for IVF. Moreover, frozen embryo transfer success rates depend on a host of other factors as well like medical conditions, which tend to adversely affect the success rates of fresh IVF cycles.
What happens after embryo transfer?
The process that occurs once the embryo is transferred to the uterus is known as the frozen embryo transfer implantation timeline. It describes the frozen embryo transfer process through each step.
Day 1 – After the embryos are transferred, the cells keep dividing.
Day 2 – Embryo attaches itself to the uterine wall.
Day 3 – Implantation occurs. A little bleeding is normal.
Day 4 – Invades uterine blood vessels and takes nutrition.
Day 5 – Implantation complete.
Day 6 – HCG hormone released and present in the blood.
Day 7 – Foetal development occurs rapidly.
Day 8 – Continued development.
Day 9 – HCG rises to detectable levels.
What are the precautions required for embryo transfer?
IVF and embryo transfer are expensive and highly specialized procedures. Therefore the patient must take utmost care to ensure the viability and success of the cycle. However, expectant women are encouraged to live as normally as before and to resume their work the day after as there is no need for bed rest after the embryo transfer.
What is an IUI procedure?
An alternative approach to IVF is IUI treatment. Here, sperm are deposited directly in the uterus using an IUI catheter. The target is to ensure as many sperm as possible reach the fallopian tubules where fertilization occurs. IUI therapy is offered when low sperm count is an issue. This method of introduction ensures there are enough mature sperm to reach the eggs and fertilize them.
This is also done in a cyclical manner. First, ovulation induction is done through drugs, which results in releasing of the ovum. The release of the ovum is detected by measuring the levels of a hormone known as luteinizing hormone. This is the period when the collected and prepared sperm are introduced into the uterine cavity. IUI is less expensive than IVF but at the same time not as effective.