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[Daily variations in pregnancy hormones].
Zeitschrift Fur Geburtshilfe Und Perinatologie
|May 1, 1985
Summary
This study investigated pregnancy hormone levels and found no daily rhythm for estriol, progesterone, human placental lactogen (HPL), and SP1. However, estradiol and prolactin showed significant circadian rhythms in pregnant individuals.
Area of Science:
- Reproductive Endocrinology
- Maternal-Fetal Medicine
- Biochemistry
Context:
- Investigating hormonal changes during the latter half of pregnancy.
- Assessing serum concentrations of key pregnancy hormones via radioimmunoassay.
- Examining 58 uncomplicated pregnancies, 20 with preeclampsia, and 12 with intrauterine growth retardation.
Purpose:
- To determine if circadian rhythms exist for estriol, estradiol, progesterone, human placental lactogen (HPL), prolactin, and SP1.
- To compare hormone levels between uncomplicated and complicated pregnancies.
- To identify potential hormonal markers for pregnancy complications.
Summary:
- Serum levels of estriol, progesterone, HPL, and SP1 did not show a circadian rhythm in uncomplicated pregnancies.
- Estradiol levels were significantly higher in the morning (8:00, 12:00) and lower at night (24:00, 4:00).
- Prolactin levels were significantly lower in the afternoon (16:00, 20:00) and higher in the early morning (4:00, 8:00).
- Hormone concentrations in pregnancies complicated by preeclampsia or intrauterine growth retardation did not differ from uncomplicated pregnancies.
Impact:
- Establishes a baseline understanding of normal pregnancy hormone diurnal variations.
- Suggests that estradiol and prolactin diurnal patterns are important considerations in pregnancy monitoring.
- Indicates that routine hormone level measurements in complicated pregnancies may not require specific attention to time of day, based on this study's findings.