It is recommended you receive the rubella vaccination at least one month before trying to become pregnant. TDapâthe TDap vaccine protects against tetanus, diphtheria, and whooping cough (pertussis). This vaccine can be used either before pregnancy or after the 20th week of pregnancy.
Ogive. An Ogive (pronounced O-Jive) is a graph that represents the cumulative frequencies for the classes in a frequency distribution and it is a continuous frequency curve. Ogive has the shape of an elongated 'S' and is sometimes called a double curve with one portion being concave and the other being convex.
The Strong Perfect Graph Theorem A graph G is perfect if and only if neither G nor its complement GÂ¯. contains an induced odd circuit of length â¥5. An induced odd circuit is an odd-length, circular sequence of edges having no âshort-circuitâ edges across it, while GÂ¯ is the graph obtained by replacing edges. in G by non-edges and vice-versa.