LH Surge - PERLA Health

LH Surge

The LH Surge is described as a sudden and large increase of Luteinizing hormone (LH) levels in the blood leading to a LH peak, which happens in the middle of your menstrual cycle. The LH surge is required for ovulation and normally has a duration of 3 days, after which the levels go back down to the baseline.


  1. Direito A. et al. Relationships between the luteinizing hormone surge and other characteristics of the menstrual cycle in normally ovulating women. Fertility and Sterility. 2013:99 (1), 279-285. https://www.fertstert.org/article/S0015-0282(12)02135-8/fulltext#sec1.3.4
  2. Park S.J et al. Characteristics of the urinary luteinizing hormone surge in young ovulatory women. Reproductive Endocrinology.2007: 88(3). P684-690. https://www.fertstert.org/article/S0015-0282(07)00160-4/fulltext
  3. FDA. Ovulation (Urine Test). https://www.fda.gov/medical-devices/home-use-tests/ovulation-urine-test (accessed 5. August 2020)

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