Table 2.

Treatment protocols, cycle-specific characteristics, and pregnancy outcomes from 785 in vitro fertilization cycles among 522 women.

Characteristics	$\text{Mean}\pm \text{SD}$ (range) or $n$ (%)
Treatment protocol
Long GnRH agonist protocol	145 (18.5)
Super long GnRH agonist	10 (1.3)
Short GnRH agonist	6 (0.8)
GnRH antagonist protocol	472 (60.1)
Mild stimulation	107 (13.6)
Natural cycle	45 (5.7)
Oocyte insemination technique
IVF	458 (58.3)
ICSI	327 (41.7)
Embryo transfer day
No embryos transferred	236 (30.1)
Day 2	93 (11.8)
Day 3	396 (50.4)
Day 5	60 (7.6)
Number of embryos transferred
No embryos transferred	236 (30.1)
1 embryo	166 (21.1)
2 embryos	383 (48.8)
Controlled ovarian hyperstimulation outcomes
Peak estradiol (pg/mL)	$9475.36\pm 6274.76$ (299.00–4307.00)
Day 3 FSH (IU/L)	$7.73\pm 2.67$ (2.10–23.70)
Total number of oocytes retrieved	$9.48\pm 7.66$ (1–43)
Mature (MII) oocytes retrieved	$7.28\pm 5.82$ (0–30)
Normal (2PN) fertilized oocytes	$6.59\pm 5.59$ (0–27)
Total embryos	$6.36\pm 5.43$ (0–27)
Best embryos	$3.25\pm 3.33$ (0–22)
Fertilization ratea	$0.68\pm 0.28$ (0–1)
Pregnancy outcomes
Fertilization	729 (92.9)
Implantation failureb	441 (56.2)
Clinical pregnancyc	293 (37.4)
Spontaneous abortion	5 (0.6)
Therapeutic abortion	4 (0.5)
Stillbirth	2 (0.2)
Live birthd	282 (36.1)

Note: FSH, follicle stimulating hormone; GnRH, gonadotropin-releasing hormone; ICSI, intracytoplasmic sperm injection; IU, international unit; IVF, in vitro fertilization.

^aFertilization rate as the number of oocytes with 2PN divided by the number of retrieved oocytes.

^bImplantation failure was defined as a negative pregnancy test (serum $\mathrm{\beta }\text{-hCG}$ level $<6\text{\hspace{0.17em}mIU}/\mathrm{mL}$) 14 d following embryo transfer or insemination.

^cClinical pregnancy was defined as the presence of an intrauterine gestational sac and fetal heartbeat confirmed by ultrasound by 6 wk of gestation.

^dLive birth as the delivery of a live neonate on or after 28 wk gestation.