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Glycosylated hemoglobins in normal pregnancy and gestational diabetes mellitus
Insights
Glycosylated hemoglobins (HbA1) levels were similar in nonpregnant and normal pregnant women. However, Class A diabetics showed significantly higher HbA1 levels, indicating potential glycemic control differences during pregnancy.
Area of Science:
- Endocrinology
- Obstetrics
- Hematology
Background:
- Glycosylated hemoglobins (HbA1) reflect long-term glycemic control.
- Monitoring HbA1 is crucial for managing diabetes, especially during pregnancy.
Purpose of the Study:
- To compare HbA1 levels in nonpregnant women, normal pregnant women, and Class A diabetics.
- To investigate correlations between HbA1 and demographic factors or pregnancy outcomes.
Main Methods:
- HbA1 levels were measured using established laboratory methods.
- Statistical analysis was performed to compare groups and assess correlations.
Main Results:
- HbA1 levels were 6.1% (nonpregnant), 5.8% (normal pregnancy), and 7.0% (Class A diabetics).
- The increase in HbA1 for Class A diabetics was statistically significant (P < 0.05).
- No significant correlations were found between HbA1 and maternal age, gravidity, gestational age, race, or birth weight ratio.
Conclusions:
- Class A diabetics exhibit elevated HbA1 compared to nonpregnant and normally pregnant women.
- HbA1 levels in this study did not correlate with key demographic factors or birth weight outcomes, possibly due to the time interval between measurement and delivery.
Abstract:
Glycosylated hemoglobins (HbA1) were measured in 23 nonpregnant women, 53 normal pregnant women, and 22 Class A diabetics; the results were 6.1 +/- 0.7%, 5.8 +/- 1.0%, and 7.0 +/- 1.3% in the 3 groups, respectively. The decrease in normal pregnancy was insignificant, whereas the increase in HbA1 in Class A diabetics over the other 2 groups was statistically significant (P less than 0.05). HbA1 did not correlate with maternal age, gravidity, or gestational age at the time of sampling. There was no difference in HbA1 between whites and blacks [patients with sickle hemoglobin (HbS) were excluded] (P = 0.35), nor between primigravidas and multigravidas (P = 0.8). HbA1 levels did not correlate with the birth weight ratios in either normal pregnancies (r = 0.06, P = 0.7) or in Class A diabetics (r = -0.4, P = 0.09). This is probably due to the long interval between HbA1 determination and delivery (9.9 weeks).