19 citations
,
October 2019 in “BMC Neuroscience” This study found weak to very weak correlations between estradiol, progesterone, and testosterone levels in the cerebrospinal fluid and serum of males without cerebral disorders.
83 citations
,
February 1977 in “PubMed” This study found that exposing seasonally anestrous mares to extended light periods led to the earlier onset of endocrinologically normal estrous cycles, potentially allowing earlier breeding and foaling.
25 citations
,
February 1977 in “American Journal of Veterinary Research” This study concluded that exposing anestrous brood mares to a 16-hour photoperiod in early December led to endocrinologically normal estrous cycles starting within two months, enabling earlier breeding and foaling.
30 citations
,
February 2003 in “Annals of Neurology” This editorial discusses the hormonal basis of catamenial epilepsy, particularly focusing on the roles of progesterone and neurosteroids, and presents no new research findings.
September 2023 in “Diagnostics” In this study, researchers found a significant relationship between mid-luteal progesterone levels and 25-hydroxy vitamin D levels in infertile patients, suggesting that about 20 ng/mL of vitamin D may be necessary to trigger ovulation or support progesterone secretion.