Survival analysis of live birth and pregnancy according to the iNEST study cohort

Subfertility is generally defined as the inability to conceive after 12 or more months of unprotected intercourse. For women aged 35 and above, this definition is shortened to 6 months. Approximately 1 in 7 couples struggle with subfertility in developed countries.1 Standard treatments for subfertility, such as in vitro fertilization and intrauterine insemination are often costly and invasive. An alternative approach for treating subfertility is natural procreative technology (NPT), which aims to correct underlying causes of subfertility to facilitate natural conception and pregnancy through intercourse.