https://www.medlineacademics.com/embryology-training.php - The most efficient method of assisted reproduction is in vitro fertilization (IVF). In IVF, mature eggs are collected (retrieved) from the ovaries and sperm are used to fertilize them in a laboratory. The fertilized egg or eggs, also known as embryos, are then moved into a uterus. Using a couple's own eggs and sperm, IVF can be done in about three weeks for a full cycle. Or, eggs, sperm, or embryos from a known or unknown donor may be used in IVF. At times, a gestational transporter — somebody who has an undeveloped organism embedded in the uterus — may be utilized.