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Changes in pancreatic B cell function during late pregnancy, early lactation and postlactation
C J Hubinont1, H Balasse, S P Dufrane
1Department of Obstetrics and Gynecology, Erasmus Hospital, Brussels, Belgium.
Gynecologic and Obstetric Investigation
|January 1, 1988
Summary
Postpartum pancreatic B cell function rapidly normalizes in women, especially with lactation. This study tracked insulin and C peptide levels during pregnancy, early lactation, and postlactation.
Area of Science:
- Endocrinology
- Reproductive Physiology
Background:
- Pregnancy significantly alters glucose metabolism and insulin sensitivity.
- Lactation imposes further metabolic demands on the mother.
Purpose of the Study:
- To investigate the changes in pancreatic B cell function during the postpartum period in normal women.
- To compare B cell function between lactating and non-lactating women postpartum.
Main Methods:
- Oral glucose tolerance tests were conducted on 10 normal women.
- Measurements included plasma insulin, C peptide, and prolactin levels.
- Data were collected during late pregnancy, early lactation (5 days postpartum), and postlactation (1 week after weaning).
Main Results:
- Basal insulin and C peptide concentrations, and the B cell response to hyperglycemia, decreased significantly postpartum compared to late pregnancy.
- Early lactation and postlactation showed minimal differences, except for higher basal C peptide and lower prolactin during lactation.
- Postpartum lactating women had a lower insulin response to hyperglycemia than non-lactating women.
Conclusions:
- Pancreatic B cell function normalizes rapidly in normal women postpartum, particularly when lactation begins.
- Lactation may influence the dynamics of postpartum glucose homeostasis and B cell recovery.