Luteinising Hormone (LH): Key Role in Fertility & Pregnancy

Luteinising hormone (LH) is crucial for ovulation in women and testosterone production in men. Normal LH levels vary by menstrual phase, with peaks during ovulation. Abnormal levels can indicate conditions like PCOS or hypogonadism, affecting fertility. Blood tests and ovulation kits track LH to optimize conception chances.

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Key Takeaways

LH Surge and Ovulation: Timing Fertility with Hormonal Peaks

The LH surge triggers ovulation by releasing an egg from the ovary. This surge occurs 24–48 hours before ovulation, making it a critical marker for identifying the most fertile window in a menstrual cycle.

Understanding Normal LH Levels by Menstrual Phase for Fertility Tracking

Women’s LH levels range from 2–6 mIU/ml during the follicular phase, spike to 2–20 mIU/ml during ovulation, and return to 3–8 mIU/ml in the luteal phase. Men’s levels remain stable at 1–9 mIU/ml, supporting testosterone production.

LH Blood Tests in Fertility Treatments: Diagnosing Imbalances

LH testing is combined with FSH, estrogen, and prolactin to diagnose hormonal imbalances. High LH may signal PCOS or premature menopause, while low LH could indicate hypogonadism or eating disorders, guiding personalized fertility strategies.

LH in Ovulation Prediction Kits: How to Time Intercourse for Conception

At-home urine tests detect the LH surge to pinpoint ovulation. Using these kits daily during the menstrual cycle helps couples time intercourse for maximum pregnancy chances, especially when combined with cervical mucus observation.

LH’s Role in Corpus Luteum Function and Early Pregnancy Support

Post-ovulation, LH sustains the corpus luteum, which produces progesterone to prepare the uterine lining for embryo implantation. In pregnancy, the embryo’s beta-HCG takes over progesterone production, ensuring endometrial stability.

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