Lifestyle and home remedies. Over-the-counter medications â such as acetaminophen (Tylenol, others), ibuprofen (Advil, Motrin IB, others) and naproxen (Aleve, others) â may help ease knee pain.
What a difference a week makes! This week, a sonographer can see your baby via ultrasound as a tiny white image tucked within the gestational sac. And his heart is beating! For these first few weeks in your baby-to-be's development, he'll be nourished by the yolk sac. The yolk sac provides all the nutrients the embryo needs and produces blood cells until the placenta fully forms later in the pregnancy.
5.2 Describe the process of fertilisation, implantation of the fertilised ovum in the uterus, and the early development of the embryo and the placenta. (SAQs 5.1 and 5.2) 5.3 Explain how the fetal circulation functions and how the fetus gets nutrition from the mother via the placenta.