Multiple birth refers to the occurrence of a woman giving birth to more than one baby at the same time. This can happen in various forms, including twins, triplets, or even higher-order multiples. The most common type is twins, which can be either identical (monozygotic) or fraternal (dizygotic). The likelihood of multiple births can be influenced by factors such as genetics, maternal age, and the use of fertility treatments. Multiple births often require special medical care, as they can lead to increased risks for both the mother and the babies, including premature delivery and low birth weight.