Infertility is defined as the inability to achieve a clinical pregnancy after 12 months or more of regular, unprotected sexual intercourse (or 6 months for women aged 35 and older). It is a complex medical condition that can stem from female factors, male factors, a combination of both, or remain unexplained. Many causes of infertility can be treated, while some individuals or couples may require fertility treatments, such as in vitro fertilization (IVF), to achieve pregnancy. Source: World Health Organization (WHO) https://www.who.int/news-room/fact-sheets/detail/infertility
Approximately one in six couples experience fertility difficulties. In most cases, they can be helped with assisted reproductive technologies (ART).
Age is one of the most common reasons. Fertility in females starts to decline at age 30. By age 35, your body experiences a rapid decrease in eggs. Age also increases your risk of developing health conditions that affect fertility.