The approach has been shown to be the most effective way to teach reading; the approach is most widely used

the cell cycle is the final answer! : )

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint