Table 1.
Individual characteristics of the participants (n = 80) in the Baby Machi study by natural conception during 24-weeks follow-up, and any conception (natural or assisted) during 2 year follow up. Median (interquartile range), mean (SD), or n (%).
| Variable | Total (n = 80) | Natural Conception in 24-Weeks | Conception in Two-Years 3 | ||
|---|---|---|---|---|---|
| No (n = 45) | Yes (n = 35) | No (n = 17) | Yes (n = 59) | ||
| Observed Number of Menstrual Cycles | 5.0 (2.0, 6.0) | 6.0 (5.0, 7.0) | 2.0 (1.5, 3.5) | - | - |
| Age (Year) | 29.5 (2.7) | 29.9 (2.8) | 28.9 (2.6) | 30.4 (2.1) | 29.3 (2.9) |
| Partner’s Age (Year) | 31.8 (4.7) | 31.9 (5.0) | 31.7 (4.4) | 32.6 (6.1) | 31.1 (3.9) |
| BMI (kg/m2) | 20.8 (2.4) | 21.0 (2.0) | 20.4 (2.8) | 21.5 (2.4) | 20.5 (2.4) |
| 15.9–19.4 | 27 (34%) | 12 (27%) | 15 (43%) | 3 (18%) | 23 (39%) |
| 19.4–21.6 | 26 (33%) | 16 (36%) | 10 (29%) | 6 (35%) | 19 (32%) |
| 21.6–28.9 | 27 (34%) | 17 (38%) | 10 (29%) | 8 (47%) | 17 (29%) |
| DUI (Month) | 6 (3, 18) | 6 (3, 24) | 6 (3, 13) | 7 (3, 20) | 6 (3, 14) |
| <12 | 50 (63%) | 25 (56%) | 25 (71%) | 10 (59%) | 38 (64%) |
| 12–23 | 14 (18%) | 5 (11%) | 9 (26%) | 3 (18%) | 11 (19%) |
| 24+ | 11 (14%) | 10 (22%) | 1 (3%) | 3 (18%) | 6 (10%) |
| Do not remember | 5 (6%) | 5 (11%) | 0 (0%) | 1 (6%) | 4 (7%) |
| Smoking | |||||
| Never | 67 (84%) | 39 (87%) | 28 (80%) | 14 (82%) | 50 (85%) |
| Quit | 9 (11%) | 4 (9%) | 5 (14%) | 2 (12%) | 7 (12%) |
| Current | 4 (5%) | 2 (4%) | 2 (6%) | 1 (6%) | 2 (3%) |
| Partner’s Smoking | |||||
| Never | 48 (60%) | 27 (60%) | 21 (60%) | 12 (71%) | 34 (58%) |
| Quit | 15 (19%) | 7 (16%) | 8 (23%) | 2 (12%) | 12 (20%) |
| Current | 17 (21%) | 11 (24%) | 6 (17%) | 3 (18%) | 13 (22%) |
| Gravidity | |||||
| Gravid | 15 (19%) | 8 (18%) | 7 (20%) | 3 (18%) | 10 (17%) |
| Nulligravid 1 | 65 (81%) | 37 (82%) | 28(80%) | 14 (82%) | 49 (83%) |
| Serum AMH (ng/mL) | 5.1 (2.8, 8.0) | 5.6 (2.7, 8.6) | 4.4 (2.8, 6.8) | 5.8 (4.1, 9.3) | 4.8 (2.9, 7.7) |
| dCoital Frequency 2 | 3.3 (2.5, 8.0) | 2.5 (2.5, 4.0) | 4.0 (2.5, 8.0) | 4.0 (2.5, 8.0) | 4.0 (2.5, 8.0) |
AMH, antimüllerian hormone. DUI, duration of unprotected intercourse at enrolment. 1 Includes n = 1 participant who reported that she did not know her gravidity status. 2 Per month number of days with sexual intercourse in the past three months, reported at intake. 3 n = 4 women were lost to follow-up.