Concerning parental leave, employees in the private sector as a full time or part-time you the right to 4 months of parental leave per parent, which can be taken full-time or part-time depending on their needs before the child is 12 years old. It is necessary to have worked for the same employer at least 1 year to apply for this leave.
This leave is non-transferable, meaning a portion of this leave cannot be transferred to the other parent and is paid according to a flat rate. http://www.onem.be/fr/documentation/montants-baremes/interruption-de-carriere-credit-temps#16309
For more information:
http://www.werk.belgie.be/defaultTab.aspx?id=547
http://www.onem.be/fr/documentation/feuille-info/t19
For employees in the public sector, other rules apply. Please, check on the website of the Rijksdienst voor arbeidsvoorziening (RVA)/ Office National de l’emploi (ONEM):
http://www.rva.be/nl/burgers/loopbaanonderbreking%20en%20tijdskrediet/loopbaanonderbreking#8294
For self-employed or freelance workers however, other criteria apply. It It is best to contact the mutuelle that provides your coverage. For more information on parental leave in general: