Sometimes, infertility cannot be seen or felt through physical symptoms or signs. However, there are certain conditions that can lead to infertility and can be considered signs of female infertility, including but not limited to, endometriosis (which can cause tubal blockages), ovulation problems, painful periods, deep pain during intercourse, painful bowel motions, chronic pelvic pain, etc.
Nevertheless, the most obvious sign that a woman may be infertile is in fact the inability to get pregnant.
Check this post to learn more: Female infertility: definition, causes, signs and treatment.