Recent trends in assisted reproductive techniques and associated outcomes.
OBJECTIVE
We examined recent trends in success rates for assisted reproduction and determined the influence of changes in patient selection and treatment characteristics on these trends.


METHODS
We collected baseline information and abstracted treatment-related details and outcomes on 1244 couples accepted for in vitro fertilization (IVF) or gamete intrafallopian transfer (GIFT) at three clinics in greater Boston from 1994-1998.


RESULTS
Delivery rates per initiated cycle improved significantly from 14.9% for IVF and 20.6% for GIFT in 1994-1995 to 22.5% for IVF and 28.0% for GIFT in 1997-1998 (P < or = .001). After adjusting for female age, the two treatment-related variables that appeared most likely to explain this trend were decreased use of GnRH agonists in short course (flare) regimens and increased use of highly purified forms of urinary gonadotropins.


CONCLUSIONS
There were significant improvements in the success rates for IVF and GIFT from 1994-1998 that correlated with changes in ovulation induction regimens.
Cramer
D W
DW
Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA. dcramer@rics.bwh.harvard.edu
Liberman
R F
RF
Powers
D
D
Hornstein
M D
MD
McShane
P
P
Barbieri
R L
RL
D000328:Adult; D005260:Female; D005307:Fertilization in Vitro / Q000639:trends*; D015181:Gamete Intrafallopian Transfer / Q000639:trends*; D007987:Gonadotropin-Releasing Hormone / Q000037:antagonists & inhibitors; D006801:Humans; D018579:Patient Selection; D011247:Pregnancy; D011256:Pregnancy Outcome
D007987:Gonadotropin-Releasing Hormone