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Methods accepted by this church are referred to as natural family planning (NFP): so at one time, the term "the rhythm method" was synonymous with NFP. Today, NFP is an umbrella term that includes symptoms-based fertility awareness methods and the lactational amenorrhea method as well as calendar-based methods such as rhythm. [ 7 ]
Irregular menstruation is a menstrual disorder whose manifestations include irregular cycle lengths as well as metrorrhagia (vaginal bleeding between expected periods). The possible causes of irregular menstruation may vary. The common factors of it are related to lifestyle, such as stress, body weight, and smoking status. [1]
Quasiperiodicity is the property of a system that displays irregular periodicity. Periodic behavior is defined as recurring at regular intervals, such as "every 24 hours". [1] Quasiperiodic behavior is almost but not quite periodic. [2] The term used to denote oscillations that appear to follow a regular pattern but which do not have a fixed ...
The United States Naval Observatory states "the Equation of Time is the difference apparent solar time minus mean solar time", i.e. if the sun is ahead of the clock the sign is positive, and if the clock is ahead of the sun the sign is negative. [6] [7] The equation of time is shown in the upper graph above for a period of slightly more than a ...
Menstrual Cycle including Menstrual phase (often referred to as "period") A menstrual disorder is characterized as any abnormal condition with regards to a woman's menstrual cycle . There are many different types of menstrual disorders that vary with signs and symptoms, including pain during menstruation, heavy bleeding, or absence of menstruation.
for a z-independent η when ω is a period of the corresponding Weierstrass ℘ function. In the special case where f ( z + ω ) = f ( z ) {\displaystyle f(z+\omega )=f(z)} we say f is periodic with period ω in the period lattice Λ {\displaystyle \Lambda } .
Annual or one-time costs: Some costs only occur a few times per year, while others you’ll only pay for as needed, such as buying new equipment. You still want to budget for these expenses by ...
Oligomenorrhea is infrequent menstrual periods. [1] Generally the menstrual periods occur at intervals of greater than 35 days, with less than 9 periods in a year, where previously there had been a regularly established pattern. [1] The period may be light or short in duration, and irregular. [1]