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

Gestation period is the time between

  1. birth of the young one and puberty

  2. birth of the young one and fertilisation

  3. foetus formation and birth of the young one

  4. fertilisation and birth of the young one
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gestation period is the time between fertilisation and birth of the young one. It usually lasts for approximately 9 months.

Multiple choice

Bulldogs have to give birth by c-section because...

  1. Their heads are too big

  2. They are too fat

  3. There is too much drool

  4. Their hip ligaments are too short
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bulldogs have been selectively bred to have large heads and narrow hips, which makes natural birth difficult and dangerous for both the mother and the puppies, necessitating C-sections.

Multiple choice biology reproductive health twins reproduction and modern technology stds and infertility

Read the following statements.
(i) Birth control pills are likely to cause cardiovascular problems.
(ii) A woman who substitutes or takes the place -of the real mother to nurse the embryo is called surrogate mother.
(iii) Numerous children have been produced by in vitro fertilisation but with some abnormalities.
(iv) Woman plays a key role in the continuity of the family and human species.
(v) Foetal sex determination test should not be banned.
Which of the following pair consists of incorrect statement ?

  1. (i) and (ii)

  2. (ii) and (iv)

  3. (iii) and (v)

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Numerous children have been produced by in vitro fertilisation without any abnormality. Foetal sex determination test should be banned as it is being misused for female foeticide.

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Placenta produces certain hormones.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Placenta acts as a barrier between the mother and foetus and is a temporary association between the foetal and maternal tissues. It acts as an endocrine gland and secretes hormones such as human Chorionic Gonadotropin (hCG), chorionic corticotropin, oestrogens and progesterone.

Hence, the statement given in the question is correct. So, the correct answer is 'True'

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Choose the correct answers from the alternatives given.
The main role of placenta in embryonic development is to

  1. act as storage organ

  2. convey nerve impulses

  3. provide essential requirements for growth of embryo

  4. protect embryo from shocks
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The placenta facilitates the supply of oxygen and nutrients to the embryo and also the removal of carbon dioxide and excretory/waste materials produced by the embryo.

So the correct option is 'provide essential requirements for growth of embryo'.

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Fetal ejection reflex in human female is induced by

  1. Pressure exerted by amniotic fluid

  2. Release of oxytocin from pituitary

  3. Fully developed foetus and placenta

  4. Differentiation of mammary glands
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The signals for parturition originates from the fully developed foetus and placenta, which induce mild uterine contractions called as foetal ejection reflex. This triggers the release of oxytocin, which is birth hormone from the maternal pituitary gland. This oxytocin starts a series of powerful contractions in the uterus to help expel the baby and limits bleeding of the placenta near the entry of the vaginal canal.
Thus, the correct answer is option (C).

Multiple choice biology life processes: control and coordination feedback mechanism mechanism of hormone action and feedback mechanisms role of hormones in coordination

Uterine contraction during child birth is an example of ______

  1. Positive feed back mechanism

  2. Negative feedback mechanism

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Examples of positive feed back mechanisms are very few. One example is that of uterine contractions during child birth. Normal state of uterus is un contacted, one contraction instead of commanding to come to normal gives a message to continue further (positive feedback till the delivery is completed).

Multiple choice biology the respiratory system factors affecting breathing exchange of gases transport of respiratory gases

Perinatal asphyxia is seen in 

  1. Adults

  2. Old people

  3. Newborn infant

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Perinatal asphyxia is the medical condition resulting from deprivation of oxygen (hypoxia) to a newborn infant long enough to cause apparent harm. It results most commonly from a drop in maternal blood pressure or interference during delivery with blood flow to the infant's brain. 

Therefore, the correct answer is option C.

Multiple choice evs life is precious road safety and pollution personal health care disaster

Erythroblastosis foetalis is a disease in which

  1. adult has severe anaemia and jaundice

  2. foetus do not survive due to erythrocyte blast

  3. foetus is suffering from blood cancer

  4. foetus has severe anaemia and jaundice
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Erythroblastosis fetalis is a condition which arises when a female is rhesus negative and the mail is Rh positive.
It causes the death of the foetus within the womb or just after birth.
The child from such a couple inherits the Rh positive trait from the father. 
The Rh-positive red blood corpuscles of a foetus in the womb enter the blood of the mother where the development of Rh antibodies takes place as the mother's blood is rhesus negative it causes more harm to her. 
These antibodies along with the mother's blood on reaching the fetal circulation cause the clamping of fetal RBC. The first child is born normal because by that time the number of antibodies in mothers that remain lesser but they increase with successive pregnancy
So, the correct option is 'foetus has severe anaemia and jaundice'
Multiple choice biology mendel's law of inheritance determination of sex sex determination sex determination in humans

Mother is responsible for the sex of a baby.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sex of the child is completely dependent on the father and not mother. This is because men are XY and women are XX. This means that the woman can only donate one X chromosome to her child, while the father can either donate an X or a Y. If the father donates the X to the child, it will be XX and become a female, if the father donates a Y to the child, it will be XY and will become a male.

Multiple choice zoology aids to health innate and acquired immunity body fluids and immune responses immunity and immune system

Immunity obtained by the transfer of antibodies from the mother through the placenta by the foetus is 

  1. Artificially acquired active immunity

  2. Naturally acquired passive immunity

  3. Naturally active active immunity

  4. Artificially acquired passive immunity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Passive immunity is the type of immunization when a ready-made antibody is directly given to the patient to protect the body against foreign attack. It can be injected artificially or provided naturally by mother milk (colostrum) or by transferring it to the foetus by the placenta.

So the correct option is "Naturally acquired passive immunity".