Sleep deprivation in the last trimester of pregnancy and inadequate vitamin D: Is there a relationship?

BACKGROUND: Disturbed sleep is a significant health issue for pregnant women. Inadequate vitamin D intake is common among pregnant women and can affect many bodily systems. The purpose of this cross-sectional study was to test the hypothesis that serum vitamin D levels are low in pregnant women who have poor sleep quality in their last trimester. METHODS: We enrolled 92 pregnant women who were admitted to the Maternity Clinic of Turgut Ozal University (Ankara, Turkey) in their last trimester. Venous blood sampling was performed to determine serum 25-hydroxyvitamin D levels. Sleep quality was measured by the Pittsburgh Sleep Questionnaire. The Student t test and Chi-square test were used to evaluate the relationships between variables. Logistic regression analysis was used to identify independent predictors of the vitamin D level. RESULTS: The median score of the Pittsburgh Sleep Questionnaire was 6.2 ± 3.3 (range, 1-17). We determined that 43.5% (40) of participants had poor sleep quality. The mean number of sleep hours at night was 8.6 ± 1 hours (range, 6.30-11 hours), and the mean sleep latency was 20.3 ± 12.7 minutes (range, 5-60 minutes). Vitamin D levels were measured for 87 participants; the median serum level of 25 (OH) vitamin D was 22.9 ± 16.2 ng/mL (range, 4.9-99 ng/mL). Among all patients, we did not determine any significance between the vitamin D-deficient group and the non-vitamin D-deficient group with regard to the Pittsburgh Sleep Questionnaire Inventory (PSQI) total score and subcomponents scores of the questionnaire (p > 0.05). Among 37 patients with poor sleep quality and for whom the vitamin D level was measured, 56.8% (21) women had vitamin D deficiency, and 81% (30) women had vitamin D insufficiency. However, we did not find any significance between participants with poor sleep and participants with good sleep quality with regard to age, occupational status, relationship with her partner, prepregnancy body mass index (BMI), weight gain during pregnancy, being primiparus, length of labor, and mode of delivery. Our findings further showed that being in a low income family was associated with poor sleep quality. CONCLUSION: Inadequate vitamin D and poor sleep quality are prevalent in pregnant women, but low levels of vitamin D are not associated with poor sleep quality. Further studies with larger sample sizes and studies that include preterm deliveries and special sleep disorders should be performed to understand this issue better.

Breastfeeding throughout pregnancy in Turkish women.

INTRODUCTION: Around the world, as well as in Turkey, women breastfeed their infants as long as possible. There is, however, a strong cultural taboo against continuing breastfeeding while having a new pregnancy. The aim of this study was to evaluate the outcome of pregnancies occurring during the lactation period and to determine whether lactation throughout the pregnancy had any adverse effects. This is the first study in Turkey to provide data on the association between the practice of lactation throughout pregnancy and outcome. SUBJECTS AND METHODS: One hundred sixty-five multiparous women with singleton pregnancies who were ≥ 18 years of age, breastfeeding the previous child, and did not have systemic disease were included. Forty-five of the 165 pregnant women continued lactating, whereas 120 did not. We compared weight gain during pregnancy, hemoglobin level alterations, pregnancy complications, neonatal weight, and Apgar scores between the two groups. RESULTS: Lactating pregnant women gained less weight than the nonlactating group, and the decreased level of hemoglobin during pregnancy was significant in the lactating group. Between the two groups, there was no statistically significant difference in hyperemesis gravidarum, threatened abortion, preeclampsia, premature labor and birth, neonatal weight, or Apgar scores. CONCLUSIONS: Breastfeeding during pregnancy is not harmful, and health professionals should not advise weaning if overlapping occurs and should observe mother, infant, and fetus closely for negative effects, and if a negative effect occurs they should take precautions.