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Table 1 Characteristics of the included couples compared by maternal and paternal prepregnancy BMI

From: Association of parental prepregnancy BMI with neonatal outcomes and birth defect in fresh embryo transfer cycles: a retrospective cohort study

Variable

Prepregnancy BMI category (kg/m2)

P value a

A(M&P < 25)

B(M < 25&P ≥ 25)

C(M ≥ 25&P < 25)

D(M&P ≥ 25)

No. of cycles

3276

1571

533

361

 

Female age(y)

30.89 ± 4.50

31.51 ± 4.46

31.39 ± 4.68

32.55 ± 4.74

<0.001

Male age(y)

32.83 ± 5.32

33.49 ± 5.41

33.70 ± 5.52

34.96 ± 6.02

<0.001

Female BMI(kg/m2)

21.23 ± 2.01

21.44 ± 1.99

26.89 ± 1.59

26.99 ± 1.75

<0.001

Male BMI(kg/m2)

22.09 ± 1.94

27.27 ± 1.96

22.26 ± 1.93

27.42 ± 2.08

<0.001

Type of infertility

0.006

 Primary

1633(49.8)

755(48.1)

228(42.8)

159(44.0)

 

 Secondary

1643(50.2)

816(51.9)

305(57.2)

202(56.0)

 

Duration of infertility(y)

3.72 ± 2.78

4.07 ± 3.13

4.27 ± 3.11

4.34 ± 3.39

<0.001

Cause of infertility

 Ovulatory dysfunction

209(6.4)

104(6.6)

84(15.8)

60(16.6)

<0.001

 Diminished ovarian reserve

248(7.6)

122(7.8)

28(5.3)

27(7.5)

0.258

 Endometriosis

453(13.8)

186(11.8)

44(8.3)

27(7.5)

<0.001

 Tubal factor

2057(62.8)

1015(64.6)

360(67.5)

230(63.7)

0.163

 Uterine factor

257(7.8)

113(7.2)

47(8.8)

38(10.5)

0.164

 Male factor

1052(32.1)

513(32.7)

154(28.9)

121(33.5)

0.382

 Unexplained

230(7.0)

98(6.2)

26(4.9)

23(6.4)

0.275

ART method

0.045

 IVF

2346(71.6)

1152(73.3)

412(77.3)

265(73.4)

 

 ICSI

930(28.4)

419(26.7)

121(22.7)

96(26.6)

 
  1. Values are presented as mean ± SD or frequency (percentage)
  2. a P value is based on One-Way ANOVA for continuous variables and χ2 test for categorical variables across maternal and paternal prepregnancy BMI. Results in bold indicate statistical significance (P < 0.05)
  3. BMI body mass index, M maternal prepregnancy BMI, P paternal prepregnancy BMI, y year; ART assisted reproductive technology, IVF in vitro fertilization, ICSI intracytoplasmic sperm injection