Infertility after a previous successful pregnancy is called secondary infertility. Even though you may be in great health, subtle anatomic and hormonal issues, as well as age factors, could be contributing to your difficulty.
One of the most silent causes of secondary infertility is reproductive aging. As women get older, their ovaries contain fewer eggs that require stronger signals from the pituitary gland to ovulate. When the eggs are released, they tend to not fertilize as easily and may produce embryos that stop growing. Outwardly, this may show up as infertility. Aging factors seem to become more important as women approach age 40 and beyond.
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