Background: Menstruation has a variable pattern within a few years of menarche which may not be well understood by many adolescent girls. Providing accurate information on menstruation is necessary to reduce anxiety, menstrual morbidity and improve reproductive health of these adolescents.
Objective: To determine the age at menarche, duration of menstruation, length of menstrual cycle, regularity of menstrual cycle, prevalence of dysmenorrhoea and sources of information on menstruation.
Setting: S(T) Mary's Senior Secondary School, Accra.
Methodology: Cross-sectional descriptive study using self-administered questionnaire.
Results: Four hundred and fifty six girls whose ages ranged from 14-19 years with mean and median ages of 16 ± 0.93 years and 16 years respectively were surveyed. Their ages at menarche ranged from 9 years to 16 years and the mean age at menarche was 12.5 ±1.28 years. Their menstrual cycle lengths ranged from 21-35 days with mean menstrual cycle length of 27.9± 0.9 days; the mode and median were both 28 days. The mean duration of menstrual flow was 4.9 days with mode and median of 5 days. Seventy one percent (n=449) had menses lasting 3-5 days while 27.2% had menses lasting over 5 days. Some 24% (n=409) had irregular menses six months after their menarche and 59.6% (n=453) were experiencing menses with clots. The prevalence of dysmenorrhoea was 74.4% (n=453). Some 80.2% (n=378) of the girls got counselling and education on care for their menses from their parents.
Conclusion: The age at menarche and other menstrual characteristics observed in this study are similar to adolescent menstrual characteristics described by studies in other populations in the world.
Keywords: Adolescent menstruation; dysmenorrhoea; menarche; menarcheal age; menstrual cycle.