The large majority, however, will not reach full maturity. Most will die off in a process called atresia. Thus, only about of these eggs will mature over a women's life span.
The maturation of eggs typically takes about 14 days and can be divided into 2 distinct periods. During the initial period, many eggs, as many as , begin to develop and mature.
The second phase of development requires gonadal hormone stimulation to stimulate further development. However, even though hundreds of eggs have begun to mature, most often only one egg will become dominant during each menstrual cycle, and reach its' fully mature state, capable of ovulation and fertilization. Pre-pubertal girls do not produce the gonadal hormones that are necessary for the second phase of development, so the many eggs that started to mature will simply wither away. The large number of eggs that are used each month account for the steady decline in the female's total egg pool that occurs from birth to menopause.
In post-pubertal females, the dominant egg continues to develop, relying on hormones for growth and stimulation.follow
Caregiving to Elderly Parents and Employment Status of European Mature Women
When the egg becomes fully mature, the follicle surrounding the egg bursts, and releases a mature egg which travels through the fallopian tube toward the uterus. The egg is capable of being fertilized for a short period, about 48 hours. If the egg is not fertilized during this time, it will die, and in another week or so, a new cycle of egg maturation will begin. This cyclic process of development continues through out a female's life until most or all of the eggs are depleted. This is the period of life known as menopause. This occurs sometime in the 4th or 5th decade of life, with the average age in the US being Sign in.
MATURE WOMEN AND FUNCTIONAL AGING | Integrated Approach to Obstetrics and Gynaecology
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