Introduction to Assisted Reproduction
- Assisted reproduction refers to medical techniques that support individuals or couples who are facing difficulties in conceiving a child naturally.
- These techniques fall under a broader medical category called Assisted Reproductive Technology (ART).
- ART involves manipulating eggs, sperm, or embryos outside the human body to achieve pregnancy.
- The two most prominent techniques used in ART are In Vitro Fertilization (IVF) and Intracytoplasmic Sperm Injection (ICSI).
- IVF was first successfully performed in 1978, marking a revolutionary breakthrough in reproductive medicine.
- ICSI, developed later, became a major advancement in cases where male infertility is a contributing factor.
Detailed Process of In Vitro Fertilization (IVF)
IVF is a multi-step procedure that requires careful hormonal control, precise laboratory techniques, and close medical supervision. The process is carried out in several stages:
Step One: Ovarian Stimulation (Also called Superovulation)
- The woman undergoes hormonal therapy using fertility drugs, usually for 8 to 14 days, to stimulate the ovaries to produce multiple mature eggs instead of the single egg normally released during a menstrual cycle.
- These drugs mimic the action of natural hormones like follicle-stimulating hormone and luteinizing hormone.
- Producing multiple eggs increases the likelihood of successful fertilization and implantation.
- Throughout this phase, transvaginal ultrasounds and blood hormone level tests are performed frequently to track the growth and maturity of the ovarian follicles.
Step Two: Egg Retrieval (Follicular Aspiration)
- When the follicles have reached optimal size, a trigger injection (usually human chorionic gonadotropin) is given to mature the eggs.
- Egg retrieval is performed approximately 34 to 36 hours after the trigger shot.
- A thin needle, guided by ultrasound, is inserted through the vaginal wall into the ovarian follicles to collect the eggs.
- The fluid from each follicle is aspirated, and the mature eggs are isolated in the lab by embryologists.
- The procedure takes about 20 to 30 minutes and is generally done under light sedation.
Step Three: Sperm Collection and Preparation
- A fresh sperm sample is usually collected from the male partner on the same day as egg retrieval.
- If the male partner cannot produce a sample or has undergone a vasectomy, sperm may be surgically retrieved from the testicles or epididymis.
- In the laboratory, sperm are processed to isolate the healthiest and most motile spermatozoa. This preparation helps improve the chances of successful fertilization.