Biology

Pregnancy and Childbirth

964 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

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.

Multiple choice

The connecting link between mother' s blood and foetal blood is termed as

  1. uterus

  2. placenta

  3. fallopian tube

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

The placenta is the temporary organ that forms during pregnancy and serves as the interface between maternal and fetal blood circulation. It facilitates nutrient, oxygen, and waste exchange while keeping the blood supplies separate. The uterus hosts the fetus, fallopian tubes transport eggs, and direct blood mixing between mother and fetus does not occur.

Multiple choice

Directions: Read the following information and answer the given question.

Mrs. Gupta was expecting from the last one month. Both Mrs. and Mr. Gupta went to a maternity hospital. They expressed their desire to know the sex of their unborn child to the concerned doctor. The doctor refused to comply to this request. They even tried to bribe the doctor, but he disagreed.

Why is it illegal to know the sex of an unborn child?

  1. Parents might arrange special ceremonies for the baby boy.

  2. Parents might go for female foeticide after knowing that it is a female baby.

  3. Parents might disclose the sex to relatives also and they can arrange a surprise party for the couple.

  4. The sex determination procedure is harmful.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sex determination before birth is illegal in India primarily to prevent female foeticide - the selective abortion of female fetuses due to cultural preference for male children. This practice has led to severely skewed sex ratios in some regions. The doctor's refusal aligns with the PCPNDT Act. Options A and C describe positive celebrations, not illegal acts. Option D is incorrect - the procedures themselves (ultrasound) are not inherently harmful when used properly.