Nope, A study found that the majority of twins born in August are also one of them. Many twins are also born in different months depending on the stage of the pregnancy, although August is the most common month for twin and kid deliveries. " Your twins may be born prematurely. For most twin pregnancies, doctors consider 37 weeks to be full-term. But because many babies are born before this date, your doctor may want to check up on you more frequently. Twins are very rare, occurring off-the-cuff after a single sperm meets an egg. That means there's no way to predict how many kids you should expect until they're born. Some families are even surprised to find out they have multiple births. Other families don't know anyone who has been able to have more than one child. The only sure thing is that you will have twins or nothing at all. There's also no way to tell which twins you should expect to see until they come out of the womb. The chance of delivering two babies in a single birth is about 1 in 150. However, because most babies are born between 37 and 42 weeks, the risk drops to about 1 in 200 for infants delivered at term. The likelihood of twins coming out together vs. apart depends on several factors, including how far along you are in your pregnancy when they are born. Twins can also be born early or late. If one baby is born first, she tends to be smaller than her brother or sister.