Survival function of fsh and lh responses to gnrh by ovaries steroids in luteal phase of the cycle of women

Aim of this paper is to find a mathematical model to determine the role of ovarian steroids in the control of GnRH induced gonadotrophin secretion in the luteal phase of the cycle of eighteen women subjects, by using survival function of Birnbaum-Saunders distribution. In reliability and survival analysis, it is often interest to determine the point at which the survival function reaches decreasing function of t from-to r1, is an increasing function of t from r1 to r2 and is a decreasing function of t from r2 to and is given by mathematical curves for the application part. It will be useful to medical professionals to find out the bounds of the corresponding curves for FSH and LH in different situations.