If the amount of progesterone in the blood remained at the level seen in the beginning of the follicular phase for 6 straight months, what would the effect be on menstruation?

Menstruation will  disrupted.. This question forms the basis of application of progesterone pill in birth control. If the level is sustained from the follicular phase; together with oestrogen, progesterone suppresses  ovulation the  releases of oocyte(eggs).Therefore with ovulation suppressed, there will be no menstruation.

Furthermore,since it is  the non- implantation of  unfertilised egg, and the collapse of the prepared   uterine walls in anticipation of implantation that leads to menstruation, therefore if there was no egg available these sequences of events will not occur; no  shedding  of uterine wall  to  produce blood as menstruation.

Therefore a woman that takes progesterone pills to prevent pregnancy;only need to  take this pills at fixed time everyday to disrupts the follicular phase so that ovulation is suppressed. However it is advisable to take it another contraceptive pills, because of its 48hrs effective periods.

Explanation:

an individual’s sex (i.e., whether they are a male or female) is determined by the sex chromosomes. most people have two sex chromosomes, one that is inherited from their mother and one that is inherited from their father. typically, females have two x chromosomes (xx) and males have one x chromosome and one y chromosome (xy). conditions caused by changes (“mutations”) in genes located on the x chromosome are considered x-linked.

x-linked recessive inheritance

most x-linked conditions are recessive. this means that in a person with two x chromosomes (most females), both copies of a gene (i.e., one on each x chromosome) must have a change or mutation whereas in a person with one x chromosome (most males), only one copy of a gene must have a mutation. a female with a mutation in one copy of a gene on the x chromosome is said to be a “carrier” for an x-linked condition. a male with a mutation in a gene on the x chromosome is typically affected with the condition. because females have two copies of the x chromosome and males have only one x chromosome, x-linked recessive diseases are more common among males than females. however, x-linked recessive diseases can occur in both males and females.

for x-linked recessive disorders, an unaffected carrier mother who has a mutation in a gene on the x chromosome can transmit either the x chromosome with this mutation or a “normal” x chromosome to her children. if the father is unaffected, none of her daughters will be affected and all of her daughters will be unaffected—since they will inherit at least one normal x chromosome from their father. however, each daughter will have a 50% chance of being an unaffected carrier like her mother and a 50% chance of both x chromosomes being normal.