How happy are you to have twins?

The following factors may lead to twins or multiple births:

1, family inheritance: fraternal twins often have inheritance in the family. If your mother has had fraternal twins (or multiple births) in her family history, the probability of such a woman having twins will increase significantly. Some experts have said that it is as high as 1 and 7%. Usually on mom's side, but not always. The probability that every woman is pregnant with identical twins is 1/300, and identical twins are often not inherited in the family.

2. Aging: If you wait until your thirties to have children (the number of pregnant women in this age group has increased recently), you will be more likely to have twins or multiple births than young women. Because the older you get, the more hormones that stimulate ovulation will naturally stimulate your ovaries to release several eggs every month.

3. Fat and tall: Some experts point out that fat and tall women are 25-30% more likely to have twins than others.

4, fertility technology: assisted reproductive technology, it is also likely to lead to multiple pregnancies. For example, women who receive IVF treatment have a 25% chance of having multiple births, because doctors will put two or three fertilized eggs into the uterus to increase the chances of pregnancy.