Credit Green Bay Packers . In essence, the system is a complex grid of retractable arms lined with hundreds of greenhouse-type light bulbs. After a trial run in 2010, the Packers bought nine MU360 units, as they are called, enough to cover half the field.
IUD Progesterone. An Intra-Uterine Device (IUD) is a small, flexible, plastic device placed inside a womanâs uterus. Mirena is the brand-name for a type of IUD that releases synthetic progesterone hormone into a womanâs body. The IUD makes it harder for sperm and eggs to move, or for a fertilized egg to lodge in the uterus. It is 99.8% effective in preventing pregnancy, making it slightly more effective than sterilization.
1 Copper IUD. 2  The most commonly used IUD is the copper IUD (such as Paragard). 3  Copper wire is wound around the stem of the T-shaped IUD. 4  The copper IUD can stay in place for up to 10 years and is a highly effective form of contraception. The hormonal IUD, such as Mirena or Skyla, releases levonorgestrel, which is a form of the hormone progestin. 2  The hormonal IUD appears to be slightly more effective at preventing pregnancy than the copper IUD. 3  There are two hormonal IUDsâone works for 5 years, and the other works for 3 years. 4  Copper IUD.