IVF: Why semen is cleaned of abnormal sperms


Semen in a pot for analysis at the doctor's hand. [Shutterstock Images]

In Vitro Fertilization (IVF) is a technology in which an egg (from a woman) is fertilized outside the human body (with sperms from a man), in a lab setting.

“The fertilized egg is then transferred into the womb of the woman where it should implant and develop into a pregnancy,” explains Dr  Kireki Omanwa, a fertility expert.

Dr Omanwa, also the President, Kenya Obstetrical and Gynaecological Society (KOGS), says before  a woman is put on IVF, they require a first consultation which is intense and tedious to extract as much info as possible. Counseling may come into play as IVF is the only hope of conceiving.

  Dr George Ogweno, an IVF specialist in Nairobi says after consultation, tests and screening including blood tests, hormonal tests and fertility evaluation follows. A male partner, on the other hand, undergoes sperm tests.

“Once treatment starts, serial hormonal checks and ultrasounds are done periodically,” explained Dr Ogweno. 

Here is what happens thereafter:

But in IVF, the follicles are punctured during egg harvesting, hence the need for progesterone injections. Progesterone is given until the pregnancy reaches 13 weeks; after which it is left to naturally progress.