Hazard rate ratios and 95% CIs for the association between ASD and assisted conception combined and divided into IVF and OI according to specific hormones*
| Assisted conception, all | Assisted conception, boys | Assisted conception, girls | IVF, all | OI, all | |
| Downregulation | 0.82 (0.49 to 1.37) | 0.79 (0.45 to 1.40) | 0.93 (0.29 to 2.92) | 0.57 (0.28 to 1.16) | 1.09 (0.48 to 2.51) |
| FSH | 1.44 (1.16 to 1.80) | 1.32 (1.02 to 1.70) | 1.99 (1.23 to 3.18) | 1.73 (1.10 to 2.71) | 1.29 (0.89 to 1.89) |
| hCG | 1.28 (1.05 to 1.55) | 1.16 (0.93 to 1.44) | 1.85 (1.23 to 2.77) | 1.37 (0.87 to 2.15) | 1.17 (0.79 to 1.71) |
| Clomiphene | 1.14 (0.93 to 1.40) | 1.02 (0.80 to 1.29) | 1.75 (1.15 to 2.65) | 1.34 (0.54 to 3.32) | 0.82 (0.53 to 1.28) |
↵* Reference: natural conception, adjusted for maternal age, education, parity, smoking, body weight and multiplicity.
ASD, autism spectrum disorders; FSH, follicle stimulating hormone; hCG, human chorionic gonadotropin; IVF, in vitro fertilisation; OI, ovulation induction.