Though having twin babies is not in your hands, some sexual positions may increase your probability of having them.
1. Side by side:
It is also known as a doggy style where the woman will position by bending her knees, and her partner will penetrate from behind. In this position, the couple will be able to conceive twins as the cervix will be more approachable to the sperms.
2. Standing up position:
It is also another variation to doggy style where there is a chance of deep penetration.
3. Missionary position:
The man-on-top position helps the sperm to enter the egg easily, and it is the best sex position to produce twins.
4. Rear entry position:
Here, the partner enters from behind, and in this position, the sperm remains close to the cervix of the woman.
Source: Informationng.com