Progesterone. Print | Email article to a friend | Last updated: January 14, 2015. Progesterone is a hormone released by the corpus luteum in the ovary. It plays important roles in the menstrual cycle and in maintaining the early stages of pregnancy. It may also be involved in the growth of certain cancers.
Maple helicopters fall before the leaves drop from the trees. Maple trees (Acer spp.) produce winged seeds called double samaras, which twirl to the ground in late summer or early fall. They resemble helicopters in motion, earning them the common name of helicopters or whirligigs.
Harvest and Storage. If you started your pecan trees from seedlings, you can look forward to your first light nut harvests about 15 years later. Grafted trees are usually made with older pecan stock, so you will start to see nut production after just 3 or 4 years. Harvest time for pecans is early autumn.