Question
Implantation of a fertilised ovum occurs on which day following fertilisation?
The correct answer is
Day 6
Implantation Timing Following Fertilisation
The journey from fertilisation to implantation involves several key developmental stages:
- Fertilisation: Occurs usually in the fallopian tube.
- Zygote Formation: The fertilised egg begins dividing to form a 2-cell, then 4-cell structure.
- Morula: By day 3-4, the developing embryo is a solid ball of cells called a morula.
- Blastocyst: By day 5-6, the embryo develops into a blastocyst, a hollow ball with an inner cell mass (which becomes the fetus) and an outer layer.
- Implantation: The blastocyst hatches from its protective layer and begins to attach to and embed within the uterine lining (endometrium).
This process of implantation typically commences around Day 6 after fertilisation has occurred.
Therefore, the implantation of a fertilised ovum occurs around Day 6 following fertilisation.
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Important Questions from Physiology of Menstruation & Fertilization
- Withdrawal bleeding following administration of progesterone in a case of secondary amenorrhea indicates all EXCEPT:
- Diagnostic criteria for PCOD are:
1. Oligo/amenorrohoea
2. Hyperandrogenism
3. Polycystic ovaries on ultrasound
Which of the above are correct? An 18 year old unmarried girl comes with complaints of heavy, prolonged bleeding during menses. Which among the following investigations is NOT usually advised?
- Which one of the following is true about Basal body temperature?
1. Biphasic pattern
2. Increase in the level of progesterone and norepinephrine
3. Temperature falls by $0.5^{\circ}C$ after ovulation
4. It can predict ovulation precisely
Select the correct answer using the code given below: - Consider the following statements regarding infertility:
1. Endometrial biopsy provides information regarding ovulatory factor
2. Both tubal and peritoneal factors can be assessed at laparoscopy
3. Unexplained infertility may be due to luteal phase defect
Which of the statements given above is/are correct?
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