Changes

For conception, the period after stoppage of menstruation,i.e., from the 4th day onwards to 12 days corresponding to the 16th day of the menstrual cycle is considered to be the ideal period for impregnation. During the first half of the menstrual cycle, i.e., from 1st day to 14th day, estrogen hormone is dominant, and under its influence, the cervical mucus becomes watery with a high concentration of sodium chloride. This consistency is ideal for spermatozoa to travel through the cervical canal. After ovulation on the 14th day, the formation of corpus luteum leads to the dominance of progesterone hormone, and this leads to change in a characteristic of cervical mucus from watery to viscous because of increased protein content and decrease in sodium chloride. This hampers the migration of sperm in the cervical canal. Hence the ritukala of 12 days in the first half of the cycle is justified.  

For conception, the period after stoppage of menstruation,i.e., from the 4th day onwards to 12 days corresponding to the 16th day of the menstrual cycle is considered to be the ideal period for impregnation. During the first half of the menstrual cycle, i.e., from 1st day to 14th day, estrogen hormone is dominant, and under its influence, the cervical mucus becomes watery with a high concentration of sodium chloride. This consistency is ideal for spermatozoa to travel through the cervical canal. After ovulation on the 14th day, the formation of corpus luteum leads to the dominance of progesterone hormone, and this leads to change in a characteristic of cervical mucus from watery to viscous because of increased protein content and decrease in sodium chloride. This hampers the migration of sperm in the cervical canal. Hence the ritukala of 12 days in the first half of the cycle is justified.  

The possible mechanism of sex selection can be understood by knowing the swimming behavior of spermatozoa bearing X and Y chromosome in the female genital tract, as well as evidence suggesting selective penetration of spermatozoa in cervical mucus. The factors affecting the motility of sperms in genital tract are pH, temperature, viscosity, osmolarity, elements and ions. All these evidence suggest that the sex selection may depend on the female genital environment which changes throughout the cycle and hence the specific days of coitus mentioned in text may contribute to the selection of the desired offspring.  The concentration of sperm in semen increases if the coitus is performed during alternate days. More the number of Y-bearing spermatozoa, more probability of procuring a male progeny.  

The possible mechanism of sex selection can be understood by knowing the swimming behavior of spermatozoa bearing X and Y chromosome in the female genital tract, as well as evidence suggesting selective penetration of spermatozoa in cervical mucus. The factors affecting the motility of sperms in genital tract are pH, temperature, viscosity, osmolarity, elements and ions. All these evidence suggest that the sex selection may depend on the female genital environment which changes throughout the cycle and hence the specific days of coitus mentioned in text may contribute to the selection of the desired offspring.  The concentration of sperm in semen increases if the coitus is performed during alternate days. More the number of Y-bearing spermatozoa, more probability of procuring a male progeny.

==== Selection of Suitable partner for conception ====

==== Selection of Suitable partner for conception ====