You can get birth certificate on line at:
http://www.portaldocidadao.pt/PORTAL/pt/certidoes online/
The site is all in portuguese. To get a birth certificate you have to register (free) and access the certidao de registo civil link.
The following documents are required to register the child:
To get the details of the nearest civil registry office
Follow link for your nearest civil registry office addresses
http://conservatorias.com/
Every child born Portugal is eligible to getting a birth certificate
Registration is free
Birth certificate is valid forever
Please attach documents which can be used by people who would like to follow this procedure.
Please attach sample completed documents which would help other people who would like to follow this procedure.
Processing is done on the spot and birth certificate processed as you wait
Videos explaining the procedure or to fill the applications. Attach videos using the following tag <&video type="website">video ID|width|height<&/video&> from external websites. Please remove the "&" inside the tags during implementation. Website = allocine, blip, dailymotion, facebook, gametrailers, googlevideo, html5, metacafe, myspace, revver, sevenload, viddler, vimeo, youku, youtube width = 560, height = 340, Video ID = Can be obtained from the URL of webpage where the video is displayed. e.g In the following url "http://www.youtube.com/watch?v=Y0US7oR_t3M" Video ID is "Y0US7oR_t3M".
Birth occurred in Portuguese territory must be reported verbally within 20 days in the civil registry or, if the birth occurs in the health unit where it is possible to register directly.
The following people are authorized to register the birth:
Any child born on Portuguese territory has to be registered within 20 days of birth at theCivil Registry Office(Conservatria do Registo Civil); this also applies when the parents are not Portuguese.
A new government programme,Nascer Cidado(Born Citizen), has been put in place allowing parents to register the newborn directly at the hospital or maternity clinic (although this is not possible everywhere).
The civil registration in most towns begins in 1911, though there are some town registrars that have records dating back to the early 1800s. For example there are some civil registrations for Madeira According to the Family History Library Catalog there are civil registrations of births from 1834 to 1911 for non-Catholics in the district of Funchal. civil registration in Portugal is far from complete. Even with the recording of contemporary records, it is estimated that only about 85% of current births are actually recorded. Earlier records are even less complete.
http://www.irn.mj.pt/sections/cidadaos
http://www.coe.int/T/E/Legal_Affairs/Legal_co-operation/Foreigners_and_citizens/Nationality/Documents/National_legislation/Potugal-Decreto.asp
http://asag.pt/
http://www.sef.pt/portal/v10/PT/aspx/page.aspx
More information which might help people.