Trying to concieve a girl after having 4 boys.any advice.

Nature says: 1 in 2: Having daily sex, during the 5 days before ovulation, through ovulation, and for 2 days after ovulation, will give a woman a 1 in 2 chance of getting pregnant with a baby boy. A 1 in 2 chance of "success" is amazingly high, in the grand scheme of life. If really worried, a couple can get their genes checked to see if they carry a genetic defect that makes it unlikely to have girl children.