Risks of in vitro fertilization:

• Multiple births

In vitro fertilization  increases the risk of multiple births if more than one embryo is transferred to your uterus. A pregnancy with multiple  fetuses carries a higher risk of early labor and low birth weight than pregnancy with a single fetus does.

• Premature delivery and low birth weight

Research suggest that in vitro fertilization slightly increases the risk that the baby will born early or with a low birth weight.

• Ovarian hyperstimulation syndrome

Use of injectable fertility drugs, such as human chorionic gonadotrophin (HCG), to induce ovulation can cause ovarian  hyperstimulation syndrome, in which your ovaries become swollen and painful. Symptoms typically last a week and include  mild abdominal pain, bloating, nausea, vomiting  and diarrhea. If you become pregnant, however, your symptoms might last several weeks. Rarely, it’s possible to develop a more severe form of ovarium hyperstimulation syndrome that can also cause rapid weight gain and shortness of breath.