It's a long trail of bad decisions most of the time. Too many women don't take their biological clocks seriously so they prioritize the wrong things at the wrong time. They focus on career and casual dating during their prime childbearing years (their 20s) and marriage in their 30s. Then they decide to have a baby as their fertility is decreasing naturally with age and some get hit with the realization they are part of the 7% of those with additional fertility issues. Fertility treatment options are expensive and can be time consuming. With time and funds running out they opt for implanting more than one or two babies at a time with IVF or with risky ovulation drugs. Then they justify killing their babies out of "prudence. "