<p>Recombinant FSH sometimes excites the ovaries too much. This may cause pelvic pain or breathing problems. It may also make you urinate less. In rare cases, patients with this problem have had serious lung problems, including fluid in the lungs, troublebreathing, and worsening of asthma blood clots, Severe Pelvic pain, Chest pain, or Abdominal pain, Nausea, Vomiting, Sudden weight gain, Bloating, Trouble, Breathing. Recombinant FSH may cause twins or multiple births.</p>