Template:Menstrual Parameters table
From Embryology
Clinical dimensions of menstruation and menstrual cycle | Descriptive terms | Normal limits (5th - 95th percentiles) |
---|---|---|
Frequency of menses (days) | Frequent | < 24 |
Normal | 24 - 38 | |
Infrequent | > 38 | |
Regularity of menses (days) (cycle to cycle variation over 12 months) |
Absent | |
Regular | Variation ± 2 to 20 days | |
Irregular | Variation greater than 20 days | |
Duration of flow (days) | Prolonged | > 8.0 |
Normal | 4.5 - 8.0 | |
Shortened | < 4.5 | |
Volume of monthly blood loss (ml)[1] | Heavy | > 80 |
Normal | 5 - 80 | |
Light | < 5 |