TY - GEN AU - Hartikainen-Sorri,A L AU - Rantakallio,P AU - Sipilä,P TI - Changes in prognosis of twin births over 20 years SN - 0785-3890 PY - 1990///0808 KW - Adult KW - Female KW - Fetal Death KW - epidemiology KW - Finland KW - Humans KW - Infant Mortality KW - Infant, Newborn KW - Pregnancy KW - Prenatal Care KW - economics KW - Prospective Studies KW - Socioeconomic Factors KW - Twins N1 - Publication Type: Journal Article UR - https://doi.org/10.3109/07853899009147255 ER -