This is due to the fact that both intended parents have genetic links to the child. As a result, gestational surrogacy has surpassed conventional surrogacy in popularity. Every year, around 750 infants are delivered through gestational surrogacy. This number includes children born to egg and sperm donors as well. Almost all gestational carriers will deliver between 38 and 42 weeks' gestation. The baby's birth weight ranges from 500 to 5500 grams, with a average weight of 2300 grams. Survival rates are similar for babies born to gestational carriers and those born after traditional means. Most babies are healthy at birth, but they may be small for their age or have other problems like low blood pressure, heart defects, breathing difficulties, and poor feeding habits. Some children need special care after they're born: about 2% require intensive care immediately after delivery; another 1-2% will develop cerebral palsy; and about 7% will experience developmental delays such as hearing or vision problems or learning disabilities. Although most babies born to gestational carriers are healthy, around 10% have medical problems or require hospitalization shortly after birth. Many of these children have minor illnesses like colds or ear infections which do not cause any long-term problems.