Birth and Parturition
Biology ⇒ Reproduction and Development
Birth and Parturition starts at 9 and continues till grade 12.
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Describe the feedback mechanism involved in the regulation of labor contractions.
Describe the role of prostaglandins in parturition.
Describe the role of the cervix during childbirth.
Describe what happens during the placental stage of labor.
Explain the difference between natural and induced labor.
Explain what is meant by the term 'afterbirth'.
A woman in labor is experiencing irregular and weak uterine contractions. Which hormone is most likely deficient, and what effect would administering this hormone have on the labor process?
Which of the following scenarios is most likely to result in a breech birth?
(1) The fetus is positioned head-down in the uterus
(2) The fetus is positioned feet or buttocks first in the uterus
(3) The fetus is lying transversely across the uterus
(4) The fetus is positioned with the back facing the mother’s spine
During which stage of labor does the 'water break'? (1) Dilation stage (2) Expulsion stage (3) Placental stage (4) Fertilization stage
Which hormone decreases just before labor, allowing uterine contractions to begin? (1) Progesterone (2) Estrogen (3) Oxytocin (4) Prolactin
Which hormone is primarily responsible for initiating uterine contractions during labor? (1) Estrogen (2) Progesterone (3) Oxytocin (4) Prolactin
Which hormone is responsible for maintaining pregnancy until labor begins? (1) Estrogen (2) Progesterone (3) Oxytocin (4) Prolactin
Fill in the blank: The expulsion stage of labor ends with the delivery of the ________.
Fill in the blank: The first stage of labor is called the ________ stage.
Fill in the blank: The hormone ________ helps to soften the cervix and prepare it for labor.
Fill in the blank: The hormone ________ is released by the posterior pituitary gland to stimulate uterine contractions during labor.
True or False: The cervix must dilate to about 10 centimeters for the baby to pass through during birth.
True or False: The expulsion of the placenta is known as the placental stage of labor.
True or False: The expulsion stage of labor is usually the longest stage.
True or False: The fetus can survive outside the womb before 20 weeks of gestation without medical intervention.
