From: Ovulation patterns affect the offspring sex ratios and change with the women’s age
Ovulation pattern | Mean age | No | Male/female | Sex ratio | OR 95% CI | P-value |
---|---|---|---|---|---|---|
Infertile women | ||||||
R(LR + RR) | 32.6 ± 4.2 | 380 | 220/160 | 1.375 | 1.00 control | |
L(RL + LL) | 33.0 ± 4.0 | 277 | 133/144 | 0.924 | 0.67 0.49–0.92 | 0.0140 |
Total | 32.8 ± 4.1 | 657 | 353/304 | 1.161 | ||
Fertile women | ||||||
R | 32.4 ± 4.3 | 420 | 217/203 | 1.069 | 1.00 control | |
L | 32.8 ± 4.1 | 264 | 133/131 | 1.015 | 0.95 0.70–1.29 | 0.7539 |
Total | 32.6 ± 4.2 | 684 | 350/334 | 1.048 | ||
Infertile + Fertile women | ||||||
R | 32.5 ± 4.3 | 800 | 437/363 | 1.204 | 1.00 control | |
L | 32.9 ± 4.0 | 541 | 266/275 | 0.967 | 0.80 0.65–1.00 | 0.0498 |
Total | 32.7 ± 4.2 | 1341 | 703/638 | 1.102 |