The Menstrual Cycle

The Menstrual Cycle

Brainstorming Time!

What do you know about menstrual cycle?

Does menstruation occur only in humans?

What factors control menstrual cycle?

​Menstrual Cycle

The cycle of producing and releasing mature ova from the female reproductive organs.

One of  two ovaries release alternatively every 28 days

​It is a long-term proces controlled by numbers of hormones, which

• Prepare the uterus to receive any fertilized ova

• Control the development of mature ova
  

Hormones involved in menstrual cycle

• Oestrogen

• Progesterone

• FSH

• LH

Multiple Choice

Menstrual Cycle is controlled by

• drugs

• food

• environment

• hormones

Fill in the Blanks

Menstrual Cycle lasts for

days

PHASES OF MENSTRUAL CYCLE

​1. Menstruation

• Also known as Period and lasts about 5 days

• The uterus lining is shed together with blood and tissue fragments

• The stage is triggered by a decrease in concentration of progesterone
  
  
  

Multiple Choice

A woman's period may last for

• 28 days

• 5 days

• 3 days

• 13 days

Fill in the Blanks

During menstruation, a woman need to eat

• Blood vessels grow and uterus lining become to thick again and stable

• This stage is triggered by increase concentration in oestrogen

​2. Repair Phase

Multiple Choice

The shed uterus lining become to thick again

• before menstruation

• during menstruation

• after menstruation

• at the time of birth

Fill in the Blanks

The repair face is driven by an increase concentration of

hormone.

• A mature egg is released into oviduct from the ovary

• If the sperm arrive at oviduct, fertilisation occur and a women become pregnant

• Ovulation occurs during 13^th to 15^th days of menstrual cycle

• It is triggered by Luteinising hormone

​

​3.Ovulation

Multiple Choice

Ovulation is the release of an egg from

• oviduct

• ovary

• uterus

• testis

Multiple Choice

Ovulation happens on what days of menstrual cycle?

• 12

• 14

• 16

• 18

Fill in the Blanks

Ovulation stage is triggered by

hormone

​4.Receptive Phase

• The uterus lining and blood vessels are now well developed

• If fertlisation has occurred, the embryo can become buried in the lining (Implantation)

• It is triggered by an increase concentration of progesterone.

Fill in the Blanks

If fertilisation happens, the embryo is buried in the uterus lining and it is called

​5. Premenstrual phase

• The uterus lining start broken down unless embryo implantation

• Progesterone hormone level fall of

• And menstruation starts and the cycle starts again

• If pregnancy happens, menstrual cycle stops and progesterone level stay high

Fill in the Blanks

If pregnancy happens, the menstrual cycle

Multiple Select

Pregnancy can happen ________phase of menstrual cycle fertilisation has occurred.

• Menstruation

• Repair

• Receptive

• Premenstrual

Fill in the Blanks

The uterus lining become thicker and thicker at

phase

Open Ended

How many hormones stimulate the processes of menstrual cycle?

Multiple Choice

Oestrogen and progesterone are secreted by

• pancreas

• brain

• testes

• ovary

Multiple Choice

FSH and LH are secreted by

• testes

• ovary

• pituitary gland

• pancreas