A study from the NIH reveals that twins have smaller thigh volumes, less fat, and less muscle mass than singletons starting ...

Twins—smaller at birth, on average, than singletons—start out smaller in pregnancy than was previously known, according to a ...

Twin pregnancies need extra care. Your doctor will keep a close eye on your babies' growth with regular ultrasounds, especially in the third trimester. Are di-di twins identical or fraternal?

Included in the analysis were 3D ultrasound scans of 2,604 singleton pregnancies and 315 twins. All twin pairs had individual placentas. Twin pairs who shared a placenta were not included in the ...

NIH findings could lead to more efficient monitoring of twin pregnancies.