The E.R.A. Test Claims to Boost I.V.F. Success. The Science Is Unclear.
For patients undergoing in vitro fertilization, there is a common test to help determine the best time to transfer the embryo for a successful pregnancy. But new research has patients and doctors questioning whether the test — one of a growing number of expensive “add-ons” for I.V.F. patients — is effective for first-time patients. The…