This is the cervix of a 30 year old woman who has given birth vaginally twice.
She typically has a 24 to 25 day cycle. This cycle was 24 days and 23 days are pictured below.
Day 1
Red bleeding from the os.
Day 2
Red blood flowing from the os and covering much of the cervix.
Day 3
Red blood flowing from os.
Day 4
Day 5
Last day of menstrual bleeding.
Day 6
Spotting.

Day 7
Day 8
Day 9
Day 10
Milky, creamy cervical fluid coming from os and collecting in speculum.
Day 11
Cervical fluid milky and clear.
Day 12
Day 13
Day 14
Day 15
Day 16
Day 17
Day 18
Day 19
Day 20
Day 21
Day 22
Day 23