Abstract
The effect of the suckling stimulus on pulsatile luteinizing hormone (LH) secretion in mid- and late lactation (days 10 and 20 of lactation) in rats was examined. Pulsatile LH secretion was strongly suppressed on either day 10 or 20 of lactation in intact rats in which the baselines of LH secretion were kept very low. In ovariectomized rats the baseline was kept as low as was observed in intact rats on day 10 of lactation, and pulsatile LH secretion was observed in 3 out of 6 rats. On day 20 the baseline secretion increased and pulsatile LH secretion was observed in 5 out of 6 rats, and the baseline for each rat showed various levels. These results clearly indicate that the pulsatile LH secretion was strongly suppressed until ovulation occurred on day 18-23 of lactation in intact rats and suggest that suppression of pulsatile LH secretion by the suckling stimulus at the hypothalamo-pituitary level is removed in late lactation and the time of the removal varies from animal to animal.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
