Fertility Hormone: What They Mean for Pregnancy

Reviewed by Reviewed by Indira IVF Fertility Experts ,

Expert Verified

Last updated: January 05, 2026

Overview

Fertility isn’t all luck; it relies on hormonal balance. It’s about how well your body stays in balance. The specific fertility hormones regulate ovulation, egg and sperm quality, and the entire conception process. When these natural messengers work together normally, pregnancy feels natural. When they don’t, your body is simply asking for a bit of help. With small changes and self-care, you can support your body and move toward the family you’re hoping for.
This guide helps you understand the connection between the fertility hormone and pregnancy. Learn how your hormones shape fertility, what balance looks like, and practical ways to restore it. You have more control than you think, and this knowledge is your foundation.

What are Fertility Hormones?

Fertility hormones are natural signals that regulate the body's preparation for conception. Produced in the brain and reproductive system, they regulate ovulation, sperm formation, and the readiness for pregnancy. In women, they manage egg growth and uterine preparation. In men, they maintain sperm health and testosterone levels. The fertility hormones may include FSH, LH, progesterone, and oestrogen, each with its specific roles and effects when imbalanced. Let’s understand them in detail.

Key Female Fertility Hormones & Normal Levels

Hormone	Role	Healthy Range	When It’s High	When It’s Low
FSH	Helps your eggs mature naturally	3–10 mIU/mL	May show that your egg reserve is declining.	Could mean your brain isn’t signalling your ovaries strongly enough.
LH	Encourages ovulation to occur.	2–12 mIU/mL	Often linked to PCOS.	Ovulation might not happen
AMH	Shows how many eggs you’ve got left.	1–4 ng/mL	Often higher in PCOS.	Means the egg reserve is running low.
Estrogen	Builds up your uterine lining for new life.	30–400 pg/mL	May cause estrogen dominance or cysts.	May lead to a thinner lining; this is often reversible.
Progesterone	Nurtures and maintains early pregnancy.	>10 ng/mL	Sometimes linked to adrenal imbalance.	Suggests ovulation may need support.
Prolactin	Keeps other hormones working together.	2–25 ng/mL	Can stop ovulation temporarily.	Suggests weak pituitary signalling.

Key Male Fertility Hormones & Their Role

1. Testosterone

Supports fertility, energy, and confidence.
Normal range: 300–1000 ng/dL
Low levels can cause tiredness or lower fertility, but balance can be restored naturally or with medical help.

2. FSH (Follicle-Stimulating Hormone)

Encourages sperm growth in the testes.
Normal range: 1.5–12.4 mIU/mL
High FSH might point to testicular strain; low FSH can indicate the brain’s signalling needs adjustment.

3. LH (Luteinizing Hormone)

Encourages the testes to produce testosterone, supporting male strength, fertility, and energy flow.
Normal range: 1.8–8.6 mIU/mL

4. Prolactin

Maintains inner balance, keeping testosterone levels stable and aiding sperm maturity.
Normal range: 2–18 ng/mL
High prolactin levels often reflect stress or lifestyle imbalance, which can reduce fertility.

How Hormonal Imbalance Affects Fertility

When hormone levels deviate from the normal range, fertility can decline in subtle or severe ways.

In Women:

Ovulation issues: Insufficient levels of LH or FSH may prevent egg release.
Irregular periods: Caused by oestrogen and progesterone fluctuations.
Poor egg quality: Linked to low oestrogen or high FSH.
Increased miscarriage risk due to low progesterone.

In Men:

Low sperm count: Caused by insufficient testosterone or FSH.
Poor sperm motility or shape:

Common Questions Asked

What hormones are most important for getting pregnant?

FSH, LH, estrogen, progesterone, and AMH regulate follicular growth, ovulation, and endometrial preparation.

Can a hormonal imbalance be treated naturally?

Yes! With healthy food, restful sleep, and stress control, many people see improvements. For deeper issues, fertility experts can help.

How do I know if my hormones are affecting fertility?

If your periods are unpredictable, you’re not ovulating regularly, or conception takes longer than expected, hormones could be part of the cause.

When should hormone levels be tested during the cycle?

FSH, LH, and Estradiol are measured on days 2–3; progesterone is assessed around day 21 of your menstrual cycle.

What hormone is checked during IVF?

AMH, FSH, LH, estrogen, and progesterone are checked to monitor egg development and timing.

What is the normal hormone level?

It differs for each hormone and changes through the cycle. Your doctor will interpret it.

What is the hormone for fertility?

There’s no single fertility hormone. It’s a balance of several (FSH, LH, estrogen, progesterone, and testosterone).

What is the fertility hormone called?

Women rely on FSH and LH to release eggs, while men depend on testosterone to produce healthy sperm.

Which hormone increases fertility in females?

When estrogen and progesterone are in balance, your body is at its most fertile.

What hormone is high to get pregnant?

Right before ovulation, LH spikes to release the egg, and progesterone rises later to help the body get ready for pregnancy.

**Disclaimer: The information provided here serves as a general guide and does not constitute medical advice. We strongly advise consulting a certified fertility expert for professional assessment and personalized treatment recommendations.