Characteristics of Couples Beginning Treatment with Natural Procreative Technology, by Subsequent Conception Status
| Patient Characteristic | All Eligible Couples* | NPT Treatment, Conceived | NPT Treatment, Did Not Conceive |
|---|---|---|---|
| Total (n)† | 1072 | 364 | 708 |
| Woman's age (mean years [range]) | 35.8 (25–48) | 34.8 (25–45) | 36.4 (26–48) |
| Prior years attempting to conceive (mean [range]) | 5.6 (1–20) | 4.8 (1–17) | 6.1 (1–20) |
| Had previous live birth (percent yes) | 24 | 30 | 20 |
| Received previous ART‡ (percent yes) | 33 | 21 | 39 |
* One hundred sixty-seven couples were not eligible because they had been trying for less than 1 year or because they did not complete the evaluation after the initial consultation.
† Number of couples in each category. Age was available for all women. For previous years attempting to conceive, 30 (2.8%) had missing data; for previous births, 30 (2.8%) had missing data; for previous ART, 20 (1.9%) had missing data.
‡ Assisted reproductive technology (ART) includes in vitro fertilization with or without intracytoplasmic sperm injection.