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  .
If fertilization does not occur the egg dissolves after 24 hours. At this time your hormone levels will decrease and your uterine lining will begin to shed about 12-16 days from ovulation. This is menstruation (menstrual period) and brings us back to day 1 of your cycle. The journey then begins all over again.he Ovulation Cycle Divided into Two Parts: The first part of the ovulation cycle is called the follicular phase. This phase starts the first day of the last menstrual period (LMP) and continues until ovulation. This first half of the cycle can differ greatly for each woman lasting anywhere from 7 days until 40 days.