Rhonda J. Pomerantz, MD is a practicing Dermatologist (Skin Specialist) in New York, NY. Dr. Pomerantz graduated from New York University School of Medicine in 1989 and has been in practice for 28 years. She completed a residency at Suny Health Science Center. Dr. Pomerantz also specializes in Internal Medicine.
Identical twins form when one egg has been fertilised by one sperm and the zygote splits into two. This happens at the very earliest stage of development, when the zygote is no more than a cluster of a few cells.
Many twins are delivered without any major problems. How Early Can Twins Be Born? Twins can be born much earlier than normal. Itâs possible to deliver twins after less than 25 weeks of pregnancy. The earlier twins are born, the higher their risk of developing multiple health problems. The best answer to the question âHow early can twins be born?â is âextremely early.â Whatâs a Typical Delivery Time for Twins? The average twin is delivered after 36 weeks of gestation. Contrast that with the average for non-twins: 40 weeks. In other words, twins tend to be delivered a full month earlier than non-twins.