Freezing sperm, ova and embryos is an established practice that is performed by institutions dedicated to assisted human reproduction in most countries.
The technique for cryopreserving embryos has had significant advances in the last few years. The recently developed method of vitrification has contributed to increasing pregnancy rates to new levels. Another benefit of this technique is that it involves less exposure to substances called cryoprotectants, which are necessary for the procedure but can harm the quality of the frozen material.
Freezing eggs is an option for women who plan on delaying pregnancy for professional reasons or if they have not found a partner. Through this procedure, eggs are stored at low temperatures (-196C°) and are preserved at the age at which they were frozen.
As a woman gets older, the number and quality of her eggs will decrease, lowering the chances of pregnancy and increasing the risk of complications during gestation. These harmful effects intensify after women turn 35 years old, which is why freezing is recommended before this age.