How do i naturally increase the chances of conceiving a girl baby?

Not specificly: It is the swimmer(sperm) who gets there first that determines the sex of the baby. There is no special position, tea, day of the month or whatever else you heard that makes any difference.Some fertility centers offer ivf techniques that may increase your chances at gender selection but are expensive and not 100% successful.

The odd is ~50/50 : There isn't a sure way to get pregnant with a boy or a girl based on day the week to have relation--there are some anecdotal report to suggest certain time of day favors girl vs boy pregnancy, but no conclusive research. The only sure way is to determine genetically is via insemination etc..Otherwise, your chance is just about 50/50 naturally--same as flipping a coin for head or tail. Good luck.