Delayed embryo implantation following in vitro fertilization and embryo transfer (IVFET).
OBJECTIVE
Our goal was to compare serum human chorionic gonadotropin (hCG) levels in singleton pregnancies achieved following IVFET with those achieved following spontaneous conception.


RESULTS
The mean serum hCG level of patients who became pregnant following IVFET lagged 1.5 days behind that of patients who became pregnant spontaneously.


CONCLUSIONS
The use of gonadotropin releasing hormone analogue as part of the stimulation protocol leading to egg retrieval and IVFET results in a delay in embryo implantation.
Tulchinsky
D
D
Reproductive Endocrinology and Infertility Center, Malden Hospital, Massachusetts 02148, USA.
Tulchinsky
A
A
Paoletti-Falcone
V
V
Nash
H
H
Pazdziorko
S
S
Brown
K
K
D000328:Adult; D006063:Chorionic Gonadotropin / Q000097:blood / Q000494:pharmacology; D002996:Clomiphene / Q000494:pharmacology; D010065:Embryo Implantation, Delayed / Q000187:drug effects*; D004624:Embryo Transfer; D005260:Female; D005306:Fertilization; D005307:Fertilization in Vitro; D006062:Gonadotropins / Q000494:pharmacology; D006801:Humans; D016729:Leuprolide / Q000494:pharmacology*; D011247:Pregnancy
D006063:Chorionic Gonadotropin; D006062:Gonadotropins; D002996:Clomiphene; D016729:Leuprolide