Miscarriage after frozen embryo transfer: what to know

A frozen embryo transfer places a previously preserved embryo into the uterus. A positive pregnancy test followed by bleeding, pelvic cramps, or a fall in pregnancy hormone levels may signal an early pregnancy loss, but these symptoms do not confirm it on their own. The pregnancy location also needs checking because an ectopic pregnancy can cause pain or bleeding.

Assessment may include repeat pregnancy hormone tests and an ultrasound at a suitable stage. Progesterone support may be part of a treatment plan; do not stop prescribed micronised progesterone without instructions from your fertility team.

Contact the fertility clinic that performed the transfer and explain the bleeding pattern, pain, test results, and any medicines you use. Keep a note of when symptoms began and whether they are increasing. Use pads rather than tampons while bleeding so you can observe the amount, and rest if activity worsens cramps.

Your clinician may arrange serial blood tests or an ultrasound to clarify whether the pregnancy is developing, has ended, or is located outside the uterus. If miscarriage is confirmed, options can include waiting for the tissue to pass, medicine, or a procedure, depending on your symptoms and findings.

Seek urgent medical care for severe or one-sided pelvic pain, shoulder-tip pain, fainting, marked dizziness, fever, or bleeding that rapidly soaks pads. These signs can indicate heavy blood loss, infection, or an ectopic pregnancy and should not wait for a routine fertility appointment.

Ask whether you need repeat pregnancy hormone testing, when an ultrasound should be performed, whether to continue progesterone, and which symptoms should prompt emergency care. You can also ask when physical activity, sex, and another fertility treatment may be appropriate.