FRIDAY, June 13 (HealthDay News) -- Having delayed sleep phase syndrome (DSPS) appears to be linked to irregular menstrual cycles and increased premenstrual symptoms in women, according to a new report.

DSPS occurs when your internal clock is naturally out of sync with real time, so that staying up late and having difficulty waking early is your norm. It is unlike such conditions as jet lag, because external factors (time zone change, noise, light) do not cause your internal clock to desynchronize.

Many women get pregnant easily, but it is unlikely that they are reading this article. For other couples, having a baby may be more difficult and therefore frustrating. If you are having difficulty, undoubtedly you want to optimize the likelihood of a pregnancy by practicing informed, healthy, fertile choices. In order to increase your chances of getting pregnant, you need to create an inviting environment for an embryo to implant and develop.