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ABSTRACT
Menstrual cycle is an event that occurs throughout the reproductive age of a female before the onset of menopause. Studies have shown that red blood cell mass remains stable throughout the menstrual cycle and that Hemoglobin concentration either decrease, increase or unchanged during the early follicular phase of the menstrual cycle. This study aimed to determine the phasic effect on oxygen transport potential during menstrual cycle in young adults. Blood samples were collected longitudinally from a total of fifteen (15) subjects between the ages of 18 and 25 years with regular menstrual cycles at early follicular phase (3 – 5 days post-onset of menses), late follicular phase/ovulation (14 days post-onset of menses), and late luteal phase (22 days post-onset of menses). Haematocrit, haemoglobin concentration, oxygen saturation pressure, whole blood viscosity and oxygen transport potential were determined using standard methods. Data was subjected to statistical analysis using Graph pad prism statistical software (8.1). The result showed a relatively stable hematocrit, heamoglobin, whole blood viscosity and ultimately, oxygen transport potential at different phases of menstrual cycle though with observable shifts at ovulation phase in all parameters (P>0.05, respectively). However, there was a significant negative correlation between relative whole blood viscosity and oxygen transport potential. In conclusion, relatively stable haematocrit and haemoglobin concentration and whole blood viscosity are determinant of effective oxygen transport potentials at different phases of the menstrual cycle. The negative predictive value of whole blood viscosity on oxygen transport potential is hereby underlined in this study.
