What can you caused by enhance your chance of having a girl next time, should you already have two sons and you wish for to get a girl? Is there one method or another to improve the odds inside your of creating a boy or possibly a girl? There is no simple way in which the gender of the child might be guaranteed, but the following practice (referred to as Shettle's system) might help. Using this system is totally free; its doesn't cost you money, just your determination and desire. Some couples may be unaware with the fact that sex plays an important role in the relationship; it keeps you closer and more intimate. There are three main subclasses of gastropods; the Prosobranchia (ocean snails), Opisthobranchia (sea slugs, sea butterflies and sea hares), and Pulmonata (land and freshwater snails and slugs). Each of the subclasses has evolved in their own way and members differ in their reproduction and life cycles within the subclasses. The gastropod folks are so large it really is impossible to spell out living cycle of each one individual species, but a majority of general rules do apply. The more evolved the species, the more complex their reproductive cycle in addition to their biology. Here we will look at the life span cycle of a gastropod through various examples and how they differ with regards to the type. For instance anal sex without using any preventive measures and then proceeding to continue with normal sexual intercourse can lead to the entry of bacteria inside the urinary tract through the vaginal canal.