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Table 1 SSRs of babies from different patients with ART and birth types

From: Associated factors of secondary sex ratio of offspring in assisted reproductive technology: a cross-sectional study in Jilin Province, China

 

Total births

Male babies

Female babies

SSR(%)

Infertility type

 Primary

2674

1361

1313

50.90

 Secondary

1159

580

579

50.04

Infertility factor

 Male

1532

766

766

50.00

 Female

1462

747

715

51.09

 Both male and female

548

276

272

50.36

 Unknown

291

152

139

52.23

Fertilization method

 IVF

2290

1177

1113

51.40

 ICSI

1276

611

665

47.88

 R-ICSI

267

153

114

57.30

Embryo transfer morphology

 Fresh

834

430

404

51.56

 Thawed

2999

1511

1488

50.38

Birth type

 Singletons

2147

1076

1071

50.12

 Twins

1686

865

821

51.30

Total

3833

1941

1892

50.64