born through surrogacy compared to those born through in vitro fertilization but both methods have similar rates of birth defects. Indications for surrogacy Opting for surrogacy is often a choice made when women are unable to carry children on their own. This can be for a number of reasons, including an abnormal uterus or a complete absence of a uterus either congenitally (also known as Mayer-Rokitansky-Kuster-Hauser syndrome) or post-hysterectomy. Women may have a hysterectomy due to complications in childbirth such as heavy bleeding or a ruptured uterus. Medical diseases such as cervical cancer or endometrial cancer can also lead to surgical removal of the uterus. Past implantation failures, history of multiple miscarriages, or concurrent severe heart or renal conditions that can make pregnancy harmful may also prompt women to consider surrogacy. The biological impossibility of single men and same-sex couples having a baby also may indicate surrogacy as an option. Gestational surrogacy In gestational surrogacy, the child is not biologically related to the surrogate, who is often referred to as a gestational carrier. Instead, the embryo is created via in vitro fertilization (IVF), using the eggs and sperm of the intended parents or donors, and is then transferred to the surrogate. According to recommendations made by the European Society of Human Reproduction and Embryology and American Society for Reproductive Medicine, a gestational carrier is preferably between the ages of 21 and 45, has had one full-term, uncomplicated pregnancy where she successfully had at least one child, and has had no more than five deliveries or three Caesarean sections. The International Federation of Gynaecology and Obstetrics recommends that the surrogate's autonomy should be respected throughout the pregnancy even if her wishes conflict with what the intended parents want. The most commonly reported motivation given by gestational surrogates is an altruistic desire to help a childless couple. Other less commonly given reasons include enjoying the experience of pregnancy, and financial compensation. History Having another woman bear a child for a couple to raise, usually with the male half of the couple as the genetic father, has been referenced since the ancient times. Babylonian law and custom allowed this practice, and a woman unable to give birth could use the practice to avoid a divorce, which would otherwise be inevitable. Many developments in medicine, social customs, and legal proceedings around the world paved the way for modern surrogacy: 1936 In the U.S., drug