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.
The Bureau of Labor Statistics reports that in 2011 the mean average annual salaries of mechanical engineers overall was $83,550. Wage earners in the lowest 10th percentile -- which would include entry-level mechanical engineers -- earned a mean average salary of $51,340.n the first two years of employment, women earn higher salaries than men, the 2012 Engineering Income and Salary Survey shows. In 2012, male engineers with less than one year of employment earned a median annual income of $55,000, while women earned $58,700.