What should you know about twins after frozen embryo transfer?

A frozen embryo transfer places one or more previously frozen embryos into the uterus during a prepared cycle. A twin pregnancy may follow if two embryos implant, or if one embryo separates into two. Ultrasound confirms the number of gestational sacs, heartbeats and placental arrangement. These findings help the team plan appointments because twins can need closer observation than a singleton pregnancy. The transfer method does not predict exactly how an individual pregnancy will progress.

Follow the fertility clinic’s instructions for pregnancy testing and medicines. [Micronised Progesterone](/materials/micronised-progesterone/) may be prescribed to support the uterine lining, but use it only as directed and do not stop it without advice. Arrange the clinic’s early scan and ask how the results will be shared with your maternity team. More detail about the procedure is available in [Frozen Embryo Transfer](/treatments/fertility-and-assisted-reproduction/frozen-embryo-transfer/).

Seek urgent medical advice for heavy bleeding, severe abdominal or pelvic pain, fainting, breathlessness, or sudden swelling and pain in one leg. Contact the fertility clinic promptly for bleeding or pain even if symptoms are mild, because early assessment can clarify what is happening.

Ask how many embryos were transferred, when the first ultrasound is planned, how twin type affects monitoring, how long prescribed support continues, and which symptoms need emergency assessment.