In instantiating the ImmutableString, the function pointers to the get and length methods actually refer to the String.get and String.length method, by going through the base variable which is an internally stored String object. The use of a function pointer can achieve inheritance of a method from a superclass.
Most women will start to show at some point between weeks 12 and 24 of pregnancy, with most reporting that they began to show during the first half of their second trimester, between 12 and 18 weeks.
Another early sign of pregnancy is the change in colour of your vulva and vagina (Chadwick's sign). It can happen as early as four weeks of pregnancy, often before you notice other signs (Cunningham et al 2005 cited by Hassall and Murray 2009:220) .owever, at this stage, your doctor will say that you're four weeks pregnant. She'll count your pregnancy from the first day of your last period, because there's no way of knowing for sure the exact day that you conceived.