What is a singleton pregnancy?

A singleton pregnancy is a pregnancy in which only one fetus is present. This is the most common type of pregnancy, accounting for about 85% of all pregnancies. Multiple pregnancy, such as twins, triplets, or higher-order multiples, occur in the remaining 15% of pregnancies.

In a singleton pregnancy, the fetus develops from a single fertilized egg. The egg implants into the wall of the uterus and grows into a placenta and an embryo. The embryo develops into a fetus over time.

Singleton pregnancies can be planned or unplanned. They can occur through natural conception or with the help of assisted reproductive technologies, such as in vitro fertilization (IVF). The most typical gestation period for a single baby is between 37 and 42 weeks.

Singleton pregnancies are generally considered to be lower risk than multiple pregnancies. This is because there are fewer potential complications, such as preterm birth, low birth weight, and developmental problems. However, singleton pregnancies can still be associated with risks, such as gestational diabetes, preeclampsia, and placental abruption.

If you are pregnant with a singleton baby, it is important to see your healthcare provider regularly to monitor your health and the health of your baby. Your healthcare provider will recommend tests and screenings to ensure that you and your baby are healthy.