Table I.
Participant characteristics comparing fertile, subfertile and infertile women.
| Fertile pregnant 1–3 months (n = 50) | Subfertile pregnant 4–12 months (n = 100) | Infertile (n = 50) | P-value | |
|---|---|---|---|---|
| Mean ± SD or n (%) | ||||
| Age (years) | 32.42 ± 2.82 | 33.00 ± 2.92 | 34.64 ± 3.68 | 0.001 |
| 30–34 | 38 (76.00%) | 77 (77.00%) | 25 (50.00%) | |
| 35–37 | 9 (18.00%) | 14 (14.00%) | 15 (30.00%) | |
| 38–44 | 3 (6.00%) | 9 (9.00%) | 10 (20.00%) | |
| BMI (kg/m2) | 24.55 ± 4.88 | 24.71 ± 5.09 | 24.99 ± 5.55 | 0.909 |
| <18.50 | 2 (4.00%) | 0 (0%) | 1 (2.00%) | |
| 18.50–24.99 | 33 (66.00%) | 70 (70.00%) | 25 (50.00%) | |
| 25.00–29.99 | 9 (18.00%) | 15 (15.00%) | 11 (22.00%) | |
| ≥30 | 8 (16.00%) | 20 (20.00%) | 8 (16.00%) | |
| AMH (ng/ml) | 5.70 ± 5.04 | 3.93 ± 3.44 | 3.14 ± 2.84 | 0.003 |
| Previous Pregnancy | 22 (44.00%) | 45 (45.00%) | 20 (40.00%) | 0.841 |
| Regular periods | 40 (80.00%) | 84 (84.00%) | 45 (90.00%) | 0.378 |
| Menstrual cycle length (days) | 29.96 ± 4.36 | 29.29 ± 7.04 | 28.47 ± 2.68 | 0.412 |
| Race | 0.183 | |||
| White | 40 (80.00%) | 80 (80.00%) | 31 (62.00%) | |
| Non-White | 10 (20%) | 20 (20%) | 19 (38%) | |
| Education level | 0.205 | |||
| College or less | 11 (22.00%) | 25 (25.00%) | 17 (34.00%) | |
| Some graduate school or more | 39 (78.00%) | 75 (75.00%) | 33 (66.00%) | |
| Married | 49 (98.00%) | 95 (95.00%) | 39 (78.00%) | 0.002 |
| Smoking status | 0.117 | |||
| Never | 42 (84.00%) | 72 (72.00%) | 42 (84.00%) | |
| Past | 7 (14.00%) | 27 (27.00%) | 6 (12.00%) | |
| Current | 1 (2.00%) | 1 (1.00%) | 2 (4.00%) | |
| History of depression | 11 (22.00%) | 37 (37.00%) | 13 (26.00%) | 0.124 |
| Hormonal contraceptive use in previous 3 months | 10 (20.00%) | 29 (29.00%) | 11 (22.00%) | 0.415 |
| Hormonal contraceptive use in previous year | 23 (46.00%) | 45 (45.00%) | 17 (34.00%) | 0.371 |
| Intercourse frequency per week | 2.17 ± 1.22 | 2.08 ± 1.40 | 2.14 ± 1.28 | 0.914 |
| Intercourse frequency during fertile window (percentage of fertile days)* | 47.85% ± 23.07% | 43.26% ± 19.55% | 38.89% ± 25.00% | 0.468 |
| Hours of vigorous exercise in the past month* | 0.700 | |||
| 0 h | 5 (10.00%) | 13 (13.00%) | 5 (10.00%) | |
| <1 h | 7 (14.00%) | 23 (23.00%) | 15 (30.00%) | |
| 1–3 h | 12 (24.00%) | 36 (36.00%) | 17 (34.00%) | |
| 4–7 h | 12 (24.00%) | 21 (21.00%) | 8 (16.00%) | |
| >7 h | 5 (10.00%) | 6 (6.00%) | 4 (8.00%) | |
| Unsure | 9 (18.00%) | 1 (1.00%) | 1 (2.00%) | |
| Number of caffeinated beverages per day* | 1.27 ± 0.78 | 1.13 ± 0.99 | 1.14 ± 0.80 | 0.72 |
| Number of alcoholic beverages per month* | 8.00 ± 9.13) | 7.77 ± 9.49 | 5.06 ± 7.08 | 0.169 |
AMH, anti-Müllerian hormone; ANOVA, analysis of variance; BMI, body mass index; SD, standard deviation.
Chi-squared test for categorical variables, ANOVA for continuous variables.
*As reported in the first cycle of enrollment.