Higher preconceptional maternal body mass index is associated with faster early preimplantation embryonic development: the Rotterdam periconception cohort

Table 7 Post-transfer treatment outcome parameters per BMI category

	Normal weight women n = 143		Overweight women n = 79		Obese women n = 46		P-value
	N	%	N	%	N	%	P-value
Positive β-hCG-test	70	43.8%	43	49.4%	20	35.1%	0.237
Gestational sac	62	38.8%	41	47.1%	18	31.6%	0.163
Fetal heartbeat	58	36.3%	36	41.4%	17	29.8%	0.369
Live born^a	36	25.2%	28	34.1%	12	23.1%	0.257