itjabi, u can start taking bird nest already, not sure abt frequency, but i think twice a week shd be fine... some of my friends took a teaspoon (those concentrated one from Yu ren sheng) twice a day, some took one bowl of freshly brewed one once a week, some took fortnightly alternate with tonic soup. mine was a combination of all the above, no fixed frequency.
for young coconut, hv been told to start two months b4 EDD and take only twice a month