Brief Answer: These drugs are unlikely to cause a lump Detailed Answer: Hi and thank you so much for this query. I am so sorry to hear about this lump that you observed. I am very happy to know you had a successful IVF and looking forward to a successful pregnancy and delivery. The drugs used after IVF simply reproduce what happens during early pregnancy and should not cause such a finding lest all pregnant women would go down with it. A swelling in the armpit can be caused by a swollen lymph node, abscess, accessory breast tissue(during pregnancy, as the breast increases in a size,persons with accessory breast tissue in the armpits observe a swelling, too), etc. However, it would be difficult to make a final call as to what the exact problem is without examination. I will suggest you report this to your OBGYN and let him/her examine it and provide more information on this. There is no emergency to go in earlier. Just use the scheduled visit to get this addressed, too. I hope this addresses your query fully. Thank you so much for using our services and please feel free to ask for clarifications if need be. I wish you the best of health and above a healthy pregnancy and a successful delivery, Dr. Ditah, MD.

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