Which one of the following is the most likely reason of not occurring regular menstruation cycle in females?

Fertilisation of the ovum

maintenance of the hypertrophical endometrial lining

Maintenance of high concentration of sex hormones in the blood stream

Retention of well-developed corpus luteum

Solution

Fertilisation of the ovum

If fertilisation occurs and the foetus is implanted in the endometrium the trophoblast cells of the developing placenta secrete a hormone human chorionic Gonadotrophic (hCG). This hormone-like LH maintains the corpus luteum and the secretion of progesterone and estradiol by it. These two hormones check the breakdown of the endometrium of the uterus. The absence of menstrual bleeding is the earilest sign of pregnancy.

Some More Questions From Human Reproduction Chapter

Seminiferous tubules open into vasa efferentia through :

Polar bodies are produced during the process :

For Daily Free Study Material Join wiredfaculty

Human Reproduction

Some More Questions From Human Reproduction Chapter

Seminiferous tubules open into vasa efferentia through :

Polar bodies are produced during the process :

In 28 days woman's menstrual cycle, ovulation occurs on :

Scrotum communicates with abdominal cavity through :

How many spermatozoa or sperms are present in human ejaculate ?

Acrosome is a part of:

Humans are :

Menstrual cycle occurs in :

Spermatozoa are produced in the .................. tubules of testes while ova are formed in the .................. of ovaries.

Corpus luteum secretes..................while Leydig cells secrete..................

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Phone Number

Email Address

Location

For Daily Free Study Material Join wiredfaculty

Human Reproduction

Which one of the following is the most likely reason of not occurring regular menstruation cycle in females? Fertilisation of the ovum maintenance of the hypertrophical endometrial lining Maintenance of high concentration of sex hormones in the blood stream Retention of well-developed corpus luteum

Some More Questions From Human Reproduction Chapter

Seminiferous tubules open into vasa efferentia through :

Polar bodies are produced during the process :

In 28 days woman's menstrual cycle, ovulation occurs on :

Scrotum communicates with abdominal cavity through :

How many spermatozoa or sperms are present in human ejaculate ?

Acrosome is a part of:

Humans are :

Menstrual cycle occurs in :

Spermatozoa are produced in the .................. tubules of testes while ova are formed in the .................. of ovaries.

Corpus luteum secretes..................while Leydig cells secrete..................

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation