To randomly allocate midwives to randomized quadrilateral blocks, interventional and control groups are used. Thus, blocks AABB, ABAA, ABBA, BABA, BBAA, BAAB are written on 6 cards and since the sample size of 90 midwives is estimated, 23 times randomly extracted from a card of one card and replaced by a replacement method Repeating. The extracted words are followed by a written statement and placed in 90 closed envelopes. Then the midwives are numbered from 1 to 90, and the first envelope, the second envelope, and the second, are divided into individuals.
To randomly assign women to Kabul urban community, randomly assigned quadrilateral blocks are used to intervene and control groups. Thus, blocks AABB, ABAA, ABBA, BABA, BBAA, BAAB are written on 6 cards, and since the sample size is 400 women, 100 times randomly extracted from a card of one card and replaced by a repeat replacement method we do. The letters extracted are followed by a single letter and enclosed in 400 closed envelopes. Then the women are numbered from 1 to 400, and the first envelope, the second envelope, and the second, are divided into individuals.