I directly know multiple people who had to get what were effectively late term abortions due to pregnancy complications that would've put their lives at risk otherwise. We don't live in the US, so they were fortunate to be able to get the medical care they needed, but it underscores the scariness of the situation in the US; these risks mean that becoming pregnant in the wrong place could literally be a life or death matter. If treatment is received, even people who experience severe complications may be able to have a successful pregnancy in future. Not having access to these things risks breaking the biological clock anyway, so waiting is not unreasonable.