Scientists measure the amount of ozone gas in a column of air. To measure this, they use Dobson units (DU). Dobson was one of the first scientists to research ozone. One Dob â¦ son unit indicates 0.01 millimeter thickness of ozone gas in a column.
6.1 Role and functional anatomy of the endometrium. 1  Introduction. 2  Functional anatomy of the endometrium. 3  Endometrial functions. 4  Cyclic hormonal alterations of the endometrium The menstruation phase. The follicular or proliferative phase. The luteinizing or secretory phase. During the secretory or luteinizing phase (14th to 28th day) the endometrium differentiates itself due to the influence of progesterone (from the corpus luteum) and attains its full maturity. The glands and arteries begin to entwine. The connective tissue stroma becomes the place of edematous changes. The time period of the maximal reception ability for the blastocyst lies between the 20th and the 23rd day. This phase of the endometrium lasts 4 days and is usually termed the  .
Luteal Phase What is the luteal phase? The luteal phase, also referred to as 'days past ovulation' or 'DPO', is the part of the cycle that starts at ovulation and ends the day before your next period. It usually lasts about 14 days and does not vary by more than a day in each person.uteal Phase What is the luteal phase? The luteal phase, also referred to as 'days past ovulation' or 'DPO', is the part of the cycle that starts at ovulation and ends the day before your next period. It usually lasts about 14 days and does not vary by more than a day in each person.