Twinges after embryo transfer, should i be concerned?

Probably not: Generally you would like an embryo transfer to go without any bleeding, cramping or discomfort; however, a few twinges should not generally effect the success of the transfer and subsequent implantation rates. I would suggest that you be on intramuscular Progesterone injections to quiet your uterus and to give you the maximum chance for implantation and a successful pregnancy. Good luck.