Biology

Pregnancy and Childbirth

996 Questions

This hub covers essential biology questions on pregnancy, fetal development, and childbirth. Topics include the placenta, maternal physiology, and the stages of labor. These concepts are frequently tested in general science sections of various competitive examinations.

Placenta and fetal nutritionStages of laborMaternal immune systemPregnancy complications

Pregnancy and Childbirth Questions

Multiple choice

Which among the following is an example of negative feedback system?

  1. Lactation

  2. Sweating

  3. Childbirth

  4. Blood clotting

  5. Lac operon in e. coli
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When the body temperature begins to rise, a negative feedback response works to counteract and stop the rise in temperature. Thus, sweating is a suitable example of negative feedback.

Multiple choice

Directions: Read the following information and answer the question that follows.

An NGO recently surveyed ten thousand women who had given birth in the last year to their first child in the city. Half of these women had chosen to have their children in a hospital or private clinic; the other half had chosen to give birth at home. Of the five thousand births that occurred in the home, only twenty-five had presented any serious complications, whereas one hundred of the hospital births had required extra attention because of complications during delivery. The NGO concluded that the hospitals are risky places in which to give birth than are homes.

Which of the following, if true, would most seriously weaken the social worker’s conclusion?

  1. Women who are expected to experience complications during delivery are encouraged to give birth in a hospital or private clinics.

  2. Many doctors discourage their patients from giving birth at hospitals.

  3. Women who give birth in their homes tend to experience less stress during labour and delivery than do those who deliver in hospitals.

  4. Women who give birth to their children in hospitals often have shorter periods of labour than those who give birth at home.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Because women who gave birth in a hospital had more complications than women who gave birth at home, the conclusion is that if women want to avoid complications, they should give birth in their homes. This would be a valid conclusion if women arbitrarily chose where to give birth.

Multiple choice

Mrs. Verma is suffering from mother-fetus Rh blood type incompatibility problems. This is happening because she is _____ and her fetus is _____ .

  1. Rh positive; Rh positive

  2. Rh positive; Rh negative

  3. Rh negative; Rh positive

  4. Rh negative; Rh negative
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In order for the fetus to be Rh positive, the father must also be Rh positive. As a result, when the mother is Rh negative and the father is Rh positive (or his Rh type is unknown), doctors usually assume that there will be a serious medical problem.

Multiple choice

In a couple, if the father of the child is Rh positive and the mother is Rh negative, what are the chances that there will be erythroblastosis fetalis problem? They already had a son and the couple has taken no medical treatment to avoid this condition.

  1. 100%

  2. At least 50%

  3. Less than 50%

  4. 0%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

If the father is homozygous dominant (DD), the chances of the fetus being Rh positive and an incompatibility problem occurring will be 100%. If the father is heterozygous (Dd), the chances are 50%. There will be no problem if the fetus is Rh negative.

Multiple choice

Carpels are simple in

  1. marginal placentation

  2. free placentation

  3. axile placentation

  4. parietal placentation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In this type of placentation, there exits only one prolongated placenta on one side of the ovary with simple carple.

Multiple choice

Implantation of human foetus typically occurs

  1. about 1 day after fertilization

  2. approximately after one week, i.e. 7 days after fertilization

  3. approximately after two weeks, i.e. 14 days after fertilization

  4. after gastrulation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Implantation of human foetus typically occurs after one week, i.e. 7 days after fertilization.

Multiple choice

Which of the following procedures usually involves in injecting a small flexible plastic tube through the vagina into the uterus?

  1. Amniocentesis

  2. Chorionic villi sampling

  3. Alpha-feto protein screening

  4. A glucose tolerance test
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This method is used to draw out a sample of chorion tissue for cell culturing. As in amniocentesis, ultrasound monitoring helps to prevent damage to the unborn child during the sampling procedure.

Multiple choice

The belief that the mother is responsible for the sex of her baby is completely wrong and to blame her for this is totally unjustified. The reason is __________.

  1. male is homogametic

  2. male is heterogametic

  3. female is homogametic

  4. female is heterogametic

  5. in female ovum has Y chromosome
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The belief that the mother is responsible for the sex of her baby is completely wrong and to blame her for this is totally unjustified.  The reason is male is heterogametic and produce two types of gamete one with x and other with y.

Multiple choice

In which of the following does Erythroblastosis fetalis occur?

  1. The mother is Rh negative, and the child is Rh positive.

  2. The mother is Rh positive, and the child is Rh negative.

  3. The father is is Rh negative, and the child is Rh positive.

  4. The father is Rh positive, and the child is Rh negative.

  5. Mother and father are both Rh positive, but the child is Rh negative.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It is an alloimmune condition that develops in fetus when the mother is Rh negative, and the fetus is Rh positive.