The corpus luteum produces progesterone. Progesterone makes the lining of the uterus thick for implantation and is necessary to sustain a healthy pregnancy. The corpus luteum produces progesterone until the placenta begins to take over progesterone production around ten weeks gestation.
Starting Salary. Individual salaries vary according to factors such as location and type of industry. Entry-level mechanical engineers holding bachelor's degrees earned average annual starting salaries of $58,600, according to the National Association of Colleges and Employers' Spring 2012 Salary Survey.
According to May 2015 records from the Bureau of Labor Statistics, the mean annual mechanical engineer salary is $83,590. In other words, the 277,500 mechanical engineers in the United States earn a mean hourly wage of $42.40. The bottom ten percent professionals earn an annual salary of $ $53,640, while the top ten percent brings home a six-figure average salary of $128,430 each year.