follicular phase

Estrogen is lowest at the beginning of the follicular phase, then rises to its highest peak shortly before ovulation.
How Your Menstrual Cycle Affects Your Injury Risk|Alex Hutchinson|March 18, 2021|Outside Online
The next phase of the trial consists of vaccinating Ebola workers on the front lines.
The Race for the Ebola Vaccine|Abby Haglage|January 7, 2015|DAILY BEAST
The families announced along with it that they had entered a “phase of silence” surrounding the details of the new deal.
A Sunni-Shia Love Story Imperiled by al Qaeda|Ruth Michaelson|December 26, 2014|DAILY BEAST
To that end, the budget postpones federal phase-out of incandescent electric bulbs.
Congress’ Gift That Keeps on Giving|P. J. O’Rourke|December 20, 2014|DAILY BEAST

Instead, the military commission proceedings are bogged down in a pre-trial phase, as it has been for the past three years.
Prosecutors Have No Idea When 9/11 Mastermind’s Trial Will Start|Tim Mak|December 17, 2014|DAILY BEAST
Arriving in Italy means they have made it to the next phase, but they have most certainly not reached the end of their journeys.
Inside the Smuggling Networks Flooding Europe with Refugees|Barbie Latza Nadeau|December 15, 2014|DAILY BEAST
But between the phase of schooling and the phase of adult learning there is an intermediate stage.
The Salvaging Of Civilisation|H. G. (Herbert George) Wells
The moment he passed out of her sight some phase of individuality promptly lit its torch.
Ancestors|Gertrude Atherton
But this was but a passing phase, and soon the thirst for glory called the young soldier to sterner things.
Napoleon's Marshals|R. P. Dunn-Pattison
The second phase was the dangerous one for Rita, and during a certain luncheon at Romanos her fate hung in the balance.
Dope|Sax Rohmer
These short studies reflect every phase of Voltaire's sparkling genius.
A Philosophical Dictionary, Volume 1 (of 10)|Franois-Marie Arouet (AKA Voltaire)

Medical definitions for follicular phase

follicular phase

The phase during which the ovarian follicle develops during the menstrual cycle.