What is implantation?

(i) Explain the events taking place at the time of fertilisation of an ovum in a human female. (ii) Trace the development of the zygote up to its implantation in the uterus. (iii) Give the name and draw a labelled sectional view of the embryonic stage that gets implanted.

What are natural rubbers and what are synthetic rubbers? What is vulcanisation? How does it improve the characteristics of rubbers?

What is the role of corpus luteum following fertilisation and implantation?

Select the correct statement regarding subcutaneous implantation of synthetic progesterone

How do the pills work ? (i) Inhibit ovulation and implantation (ii) Alter the quality of cervical muscus to prevent or retard the entry of sperms (iii) Inhibit spermatogenesis

A sperm has just fertilised a human egg in the Fallopian tube. Trace the events that the fertilised egg will undergo upto the implantation of the blastocyst in the uterus.

Read of following statements and select the correct option Statement 1 : Subcutaneous implantation of synthetic progesterone prevents pregancy for about 5 years Statement 2 : A tiny amount of progesterone is steadily released from the inserts into the blood.

Study the figure given below and answer the questions that follows. (i) Name the stage of human embryo the figure represents. (ii) Identify 'A' in the figure and mention its function. (iii) Mention the fate of the inner cell mass after implantation in the uterus.