Changes

===== Frequency =====

===== Frequency =====

Statistical estimates suggest that fecund ability rises sharply with frequency of intercourse. It is observed in a study that 94% of women aged 35 years and 77% women aged 38 years are conceived with regular intercourse for three years. The risk of erectile dysfunction in males aged among 30 to 75 years can be reduced by maintaining a regular frequency of intercourse. Coital frequency is directly related to conception. Research shows that best sperm motility is found in semen emission every three to four days on average. Intercourse every two to three days can maximize the overall chance of natural conception because spermatozoa can survive for up to seven days after insemination in the female reproductive tract. So, regular coitus with 3-4 days gap should be regarded as optimum coital frequency.

Statistical estimates suggest that fecund ability rises sharply with frequency of intercourse. It is observed in a study that 94% of women aged 35 years and 77% women aged 38 years are conceived with regular intercourse for three years.<ref>Noord-Zaadstra BM, Looman CWN, Alsbach H, Habbema JDF, te Velde ER, Karbaat J. Delaying childbearing: effect of age on fecundity and outcome of pregnancy. BMJ. 1991;302:1361–5.</ref> The risk of erectile dysfunction in males aged among 30 to 75 years can be reduced by maintaining a regular frequency of intercourse.<ref>Zhanting Qin et al.Impact of frequency of intercourse on erectile dysfunction: a cross-sectional study in Wuhan, China, Journal of Huazhong University of Science and Technology (Impact Factor: 0.58). 06/2012; 32(3):396-9.</ref> Coital frequency is directly related to conception. Research shows that best sperm motility is found in semen emission every three to four days on average.<ref>MacLeod J, Gold RZ. The male factor in fertility and infertility. V. Effect of continence on semen quality. Fertil Steril.1952;3:297–315</ref> Intercourse every two to three days can maximize the overall chance of natural conception because spermatozoa can survive for up to seven days after insemination in the female reproductive tract.<ref>Perloff WH, Steinberger E. In vivo survival of spermatozoa in cervical mucus. Am J Obstet Gynecol. 1964;88:439–42.</ref> So, regular coitus with 3-4 days gap should be regarded as optimum coital frequency.

===== Volume =====

===== Volume =====