Note: The mail service will be listening for your connection on TCP port 25. But this information will not be important until you see some Perl code later in the chapter. The message that you prepare can only use alphanumeric characters. If you need to send binary information (like files), use the MIME protocol.
With my first set of twins we were able to tell at 16 weeks and with my second set at 14 weeks. It all just depends on their position. I was having ultrasounds every two weeks so there were alot of oppurtunities to look. It would not matter if they are different sizes. Helpful (8) Nice.
1. Dichorionic/Diamniotic (di/di) twins. Di/di twins are the most common type of twins and the lowest risk. Di/di twins can be identical if the egg split very early, but fraternal twins are always di/di. In di/di twins, each twin has their own placenta and their own amniotic sac. Di/di twin pregnancies have increased risks over singleton pregnancies, but this is the best case scenario in twin world. The biggest worries tend to be going into preterm labor and making sure both babies are growing adequately.