period articles
What event officially starts the entire menstrual cycle?
Which two reproductive hormones primarily orchestrate the four main menstrual cycle phases?
What hormonal event immediately precedes and triggers the rupture of the dominant follicle during ovulation?
What is the typical duration, often around 14 days, for the luteal phase, the time between ovulation and the next period?
Which of the four primary menstrual cycle phases is generally considered the most variable in length across different cycles?
What specific range, in days, defines a cycle length considered normal for most adults?
What is the typical range of days that the phase known as menstruation (bleeding) usually lasts?
If fertilization does not occur, what happens to the corpus luteum after approximately ten to fourteen days?
How can being significantly underweight, affecting Body Mass Index (BMI), potentially disrupt the regular cycle?
What hormonal change associated with approaching perimenopause in the late 30s and early 40s can lead to shifts in cycle length?
What defines the COVID-19 incubation period between exposure and symptom onset?
What percentage of people develop COVID-19 symptoms within 11.5 days of exposure?
When does the infectious period for spreading SARS-CoV-2 generally begin relative to symptom start?
When was the initial identification of COVID-19 cases in Wuhan, China, marking the pandemic start?
Which factor influences the exact timing of COVID-19 symptom onset for an individual?
For mild to moderate COVID-19 cases, how long do active symptoms typically resolve within?
If isolation for COVID-19 is ended early (e.g., after five days), what subsequent action is usually required?
What symptom became a distinguishing hallmark early in the COVID-19 pandemic?
What is the median incubation period for COVID-19 often cited as?