The only example I could think of for Half-Duplex is actually a Parallel interface. Even though parallel is eight lanes, data travels through the lanes in the same direction at the same time but never in both directions at the same time. The IEEE-1284 allows printers to send messages to the computer.
Since sperm live for three to five days, she could definitely get pregnant.. In addition, some women experience breakthrough spotting or bleeding between periods. This can occur during ovulation and be mistaken for a period, making it difficult to establish the exact place in the menstrual cycle.
Any type of bleeding is terrifying during pregnancy, even for the most level-headed mom-to-be. The good news: Although spotting occurs in nearly one-third of all pregnancies, it often poses no threat to mom or baby.