Intrauterine administration of human chorionic gonadotropin does not improve pregnancy and life birth rates independently of blastocyst quality: a randomised prospective study

Table 2 Patients’ characteristics in cohort B: hCG administration on day 5

Characteristics	hCG (n = 510)	culture medium (n = 494)	P-Value
Female age (years) mean ± s.d (range)	37.1 ± 4.0 (20–43)	36.7 ± 4.3 (21–43)	0.102
BMI (kg/m²) mean ± s.d	22.9 ± 4.4	22.9 ± 4.3	0.917
No. MII oocytes/ OPU mean ± s.d	8.7 ± 5.0	9.3 ± 5.6	0.083
Type of Infertility (%)
-Primary Infertility	249 (48.8 %)	236 (47.8 %)	0.752
-Secondary Infertility	261 (51.2 %)	258 (52.2 %)	0.752
Cause of Infertility (%)
-Female factor	77 (15.1 %)	63 (12.8 %)	0.451
-Male factor	220 (43.1 %)	229 (46.4 %)
-Mixed	115 (22.5 %)	119 (24.1 %)
-Idiopathic	98 (19.2 %)	83 (16.8 %)

Ranges or percentages respectively are given in brackets, MII oocytes: Metaphase II oocytes; OPU = ovum pick-up; s.d.: standard deviation
Baseline characteristics of IVF patients receiving either 40 μl hCG dissolved in embryo culture medium or 40 μl plain culture (control) on day 5 after oocyte retrieval 3 minutes prior to transfer. Primary infertility was defined as the inability to become pregnant or the inability to carry a pregnancy to a live birth. Secondary infertility was defined as the inability to become pregnant or the inability to carry a pregnancy to a live birth following either a previous pregnancy or a previous ability to carry a pregnancy to a live birth

ISSN: 1477-7827