Side effects may include some local discomfort, bruising and soreness at the injection site.
Changes in mood, abdominal discomfort, bloating and cramping, ovarian cysts, breast pain, back pain, constipation and headache are other possible minor side effects.
Multiple births occur in about 20-25% of pregnancies of which 70% are twins.
Excessive enlargement of the ovaries, called ovarian hyper-stimulation (OHSS) may occur. Symptoms of OHSS include
excessive fluid retention and severe abdominal discomfort.