- •If second HCG and appropriate rise (double every 2 days) → OB ultrasound at 6–7 weeks.
- •If hx ectopic, anticoagulation, or RPL → OB U/S at 5 weeks.
- •If inappropriate HCG rise → repeat HCG in 2 days (if going into weekend, repeat in 4 days).
For IVF (April 2026 update: did not need to present these):
- •2w5d pregnant at day of transfer of embryo (even if embryo growth until day 7, because embryos are held to day 5 criteria to be appropriate for implantation).
- •Power statement: include blastocyst status (e.g., diploid, if was programed).
Tip: Get the Ferring app on your phone (free). Use to determine gestational age for IUI.