American scientists have found that among women marturomai high percentage of those who are in the later stages of pregnancy slept more than nine hours a day. Despite the fact that the authors do not make conclusions about the dangerous effects of prolonged sleep on the survival of the fetus, they suggest that this relationship may be explained by the fact that sleep is characterized by minimal blood pressure, which can adversely affect the pregnancy.
The article was published in the journal Birth.
The percentage of stillbirth in late pregnancy (at 28 weeks or later) is approximately 2.3% in developed countries. Among the factors influencing the birth of a dead child, distinguish between different medical conditions (in particular, the preeclampsia — a form of late toxemia of pregnancy characterized by high blood pressure), Smoking, obesity and later maternal age.
In the new work, scientists led by Louise O’brien (Louise O’brien) the medical Department of the University of Michigan decided to examine the relationship between sleep hygiene of women in late pregnancy and the likelihood of a future stillbirth. The study was conducted in the form of an online survey: it was attended by 633 women who provided information on age, socioeconomic status, medical conditions, presence of harmful habits, body mass index and other indicators. The scientists also detail interviewed women about their sleep hygiene: how they sleep, how often you Wake up at night and in what position they sleep.
Of all the women who participated in the issue, 153 experienced a stillbirth at 28 weeks of gestation or later, and 480 of the women gave birth to living children or were still pregnant at the time of the survey.
Researchers found that women who reported a stillbirth, by 63 percent more likely to report sleeping more than 9 hours in the last month of pregnancy, and that rarely Wake up in the night. The relationship between sleep and the proportion of stillbirth was independent of other factors.
The authors come to the conclusion that in the last months of pregnancy, long periods of undisturbed sleep can adversely affect pregnancy outcome. Scientists have noted that the mechanism isn’t clear, because the health of the pregnant woman and her fetus also impact sleep disturbances and insomnia, so to make a conclusion about causation is that it is impossible. One explanation for this relationship may lie in the fact that sleep is the period when blood pressure reaches a minimum, and low pressure, in turn, may interfere with the child’s development in the womb: the authors also explain why women who have given birth to healthy babies often Wake up at night.