Examlex
Draw for yourself the Lewis structure of ethene, C2H4, also called ethylene. How many double bonds does it have?
Barrier Methods
Forms of contraception that prevent sperm from reaching the egg by creating a physical barrier.
Contraception Use
The practice of employing methods or devices to prevent pregnancy as a part of family planning.
Fertility Awareness-Based Methods
Natural family planning techniques that involve tracking a woman's fertility signs to avoid or achieve pregnancy.
Discontinuous Innovation
Innovations that create major changes in how we live and work by introducing products or services that drastically alter the market.
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