16 public questions tagged with this topic.
Estrogen levels gradually rise during the follicular phase and peak in the late follicular phase, just before the LH surge triggers ovulation. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function, Topic: Structural organization and physiology.
During the luteal phase, the corpus luteum secretes high levels of progesterone to thicken the endometrium for implantation. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Human Reproduction and Reproductive Health, Topic: Gametogenesis, menstrual cycle and reproductive strategies.
FSH stimulates the growth and maturation of ovarian follicles during the early (follicular) phase of the menstrual cycle.
Ref: NCERT Class 12 Biology Chapter 2: Human Reproduction Menstrual Cycle Fertilization Implantation Pregnancy Parturition Lactation
The LH surge in the mid-cycle triggers the release of the oocyte from the follicle.
Ref: NCERT Class 12 Biology Chapter 2: Human Reproduction Menstrual Cycle Fertilization Implantation Pregnancy Parturition Lactation
The withdrawal of estrogen and progesterone levels, when fertilization does not occur, leads to the shedding of the endometrium (menstruation).
Ref: NCERT Class 12 Biology Chapter 2: Human Reproduction Menstrual Cycle Fertilization Implantation Pregnancy Parturition Lactation
During the luteal phase, under the influence of progesterone, the endometrium becomes thick and receptive to the implantation of a fertilized egg.
Ref: NCERT Class 12 Biology Chapter 2: Human Reproduction Menstrual Cycle Fertilization Implantation Pregnancy Parturition Lactation
Ovulation triggers the transition from the follicular phase to the luteal phase, during which the corpus luteum forms.
Ref: NCERT Class 12 Biology Chapter 2: Human Reproduction Menstrual Cycle Fertilization Implantation Pregnancy Parturition Lactation
Estrogen levels gradually rise during the follicular phase and peak in the late follicular phase, just before the LH surge triggers ovulation.
Ref: NCERT Class 12 Biology Chapter 2: Human Reproduction Menstrual Cycle Fertilization Implantation Pregnancy Parturition Lactation
The proliferative phase, part of the follicular phase, is when estrogen promotes the regrowth of the endometrium following menstruation.
Ref: NCERT Class 12 Biology Chapter 2: Human Reproduction Menstrual Cycle Fertilization Implantation Pregnancy Parturition Lactation
During the peri-ovulatory phase, cervical mucus becomes thin and alkaline to help sperm move easily towards the ovum.
Ref: NCERT Class 12 Biology Chapter 2: Human Reproduction Menstrual Cycle Fertilization Implantation Pregnancy Parturition Lactation
If fertilization does not occur, the withdrawal of progesterone and estrogen leads to the degeneration of the endometrium and the onset of menstruation.
Ref: NCERT Class 12 Biology Chapter 2: Human Reproduction Menstrual Cycle Fertilization Implantation Pregnancy Parturition Lactation
The endometrium is the innermost layer of the uterus that undergoes cyclical regeneration and shedding during menstruation.
Ref: NCERT Class 12 Biology Chapter 2: Human Reproduction Female Reproductive System and Gametogenesis
