Understanding Fertility: What Affects It and When to Seek Help
Fertility is influenced by many factors — age, hormonal health, ovarian reserve, structural anatomy, and sperm quality. Understanding the basics helps you know when to seek evaluation and what that evaluation involves.
Fertility is influenced by many factors — age, hormonal health, ovarian reserve, structural anatomy, and sperm quality. Understanding the basics helps you know when to seek evaluation and what that evaluation involves.
Age and female fertility
Ovarian reserve declines gradually through the 20s and early 30s, then accelerates significantly after 35. By 40, egg quality and quantity are substantially reduced, though many women over 40 do conceive successfully.
Conditions that affect fertility
PCOS is the most common hormonal cause of female infertility. Endometriosis, fibroids, and structural changes to the fallopian tubes or uterus can also impair fertility. Thyroid dysfunction and elevated prolactin are frequently overlooked and treatable causes.
When to seek evaluation
Seek evaluation after 12 months of unprotected intercourse without conception for women under 35, or after 6 months for women 35–39. Women 40 and older should seek evaluation immediately.
What a fertility evaluation involves
A standard evaluation includes cycle day 2–3 blood tests (FSH, LH, estradiol, AMH), a pelvic ultrasound, thyroid function, and a semen analysis for male partners.
Important safety note
Telehealth is appropriate for initial evaluation and hormonal management. For structural problems, in-person examination and imaging are required. Conditions like ovarian cysts or prior ectopic pregnancy require in-person evaluation before any fertility treatment.
This content is educational and does not constitute medical advice.
Quick answers
- Age and female fertility
- Ovarian reserve declines gradually through the 20s and early 30s, then accelerates significantly after 35. By 40, egg quality and quantity are substantially reduced, though many women over 40 do conceive successfully.
- Conditions that affect fertility
- PCOS is the most common hormonal cause of female infertility. Endometriosis, fibroids, and structural changes to the fallopian tubes or uterus can also impair fertility. Thyroid dysfunction and elevated prolactin are frequently overlooked and treatable causes.
- When to seek evaluation
- Seek evaluation after 12 months of unprotected intercourse without conception for women under 35, or after 6 months for women 35–39. Women 40 and older should seek evaluation immediately.
- What a fertility evaluation involves
- A standard evaluation includes cycle day 2–3 blood tests (FSH, LH, estradiol, AMH), a pelvic ultrasound, thyroid function, and a semen analysis for male partners.
- Important safety note
- Telehealth is appropriate for initial evaluation and hormonal management. For structural problems, in-person examination and imaging are required. Conditions like ovarian cysts or prior ectopic pregnancy require in-person evaluation before any fertility treatment. This content is educational and does not constitute medical advice.
Medical disclaimer: This article is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before starting any new treatment or making changes to your current care.