Hindi ako sure sa exact schedule ng OSPAR kasi it varies from clinic to clinic, pero usually alam mo na pwedeng mag-call directly sa OSPAR near you para malaman ang specific appointment times at available slots, mas mabilis at accurate yun kaysa mag-rely sa info na maaaring outdated na. One of my mum friends went there during her pregnancy at sinabi niya na flexible sila with scheduling, especially kung may emergency or conflict ka, so don't hesitate to ask!