Perinatal outcomes of human singletons conceived naturally versus assisted reproductive technologies: analysis of the effect of stimulated IVF, modified natural IVF, and frozen embryo transfer

Middle East Fertility Society Journal

Table 1 Demographic characteristics of included patients

Characteristics		NAT	mnIVF	sIVF	FET	p value
No. of women (n)		15770	235	384	222
Age (years)		30.69 ± 4.34	38.78 ± 3.12	38.63 ± 3.46	40.39 ± 2.06	p < 0.0001
AMH (ng/ml)			1.99 ± 2.62	2.72 ± 2.69	3.61 ± 4.76	p < 0.0001
Antral follicular Count			17.30 ± 9.90	21.42 ± 10.46	22.54 ± 11.64	p < 0.0001
Infertility type Primary/secondary			154/73	230/136	129/80	p = 0.340
Years of infertility 1 year/≥ 2 years			134/54	228/81	117/61	p = 0.168
BMI (kg/m²)	<18.5		3	9	8	p = 0.216
	18.5-24.9		110	118	80	p = 0.123
	25.0-29.9		44	49	42	p = 0.598
	30.0-34.9		19	40	24	p = 0.105
Smoking/non-smoking			21/121	29/166	17/104	p = 0.978
Insemination type Conventional IVF/ICSI			112/126	115/223		p = 0.002