Birth and Parturition
Biology ⇒ Reproduction and Development
Birth and Parturition starts at 9 and continues till grade 12.
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Describe the changes in hormone levels (estrogen and progesterone) that occur just before labor.
Describe the changes that occur in the cervix during the first stage of labor.
Describe the function of the placenta during birth.
Describe the physiological changes that occur in the uterus during labor.
Describe the role of prostaglandins in parturition.
Describe the role of relaxin during birth.
Explain the importance of the positive feedback loop involving oxytocin during labor.
Explain the positive feedback mechanism involved in parturition.
Explain the role of fetal signals in the initiation of labor.
Explain the significance of the amniotic fluid during labor.
Explain why progesterone levels fall before the onset of labor.
Explain why the expulsion of the placenta is important after birth.
Name the three main stages of labor in order.
Which hormone is responsible for the softening of the cervix before labor?
Which hormone maintains uterine quiescence (prevents contractions) during most of pregnancy?
