What factors affect my chances of conceiving?
A number of factors affect your chances of conception. They include the following:
below, (adapted from data in Taylor 2003) identifies some of the
significant factors affecting one’s chance of conception.
While some of the factors are beyond one’s control (such as age, time trying, and previous pregnancies), others are more possible to control. Particularly, identifying your fertile window and focusing intercourse within that time can dramatically increase your conception probabilities (Hilgers et al 1992; Gnoth et al 2005).
Since so many factors may come into play, it is not possible to precisely estimate your conception chances each cycle. However, when you are charting your fertility signs and examining your chart for possible clues about your pregnancy chances, the best thing to see is a clear ovulation pattern (best when correlated with multiple fertility signs) and well-timed intercourse within your fertile window.
Baird, D. D. and B. I. Strassman (2000). Women's Fecundability and Factors Affecting It. Women and Health. M. Goldman and M. Hatch. San Diego, Academic Press: 126-137.
Gnoth, C., E. Godehardt, et al. (2005). "Definition and prevalence of subfertility and infertility." Hum Reprod 20(5): 1144-1147.
Hilgers, T. W., K. D. Daly, et al. (1992). "Cumulative pregnancy rates in patients with apparently normal fertility and fertility-focused intercourse." J Reprod Med 37(10): 864-6.
Taylor, A. (2003). "ABC of subfertility: extent of the problem." Bmj 327(7412): 434-6.