1 A Follow-up of Pregnancies in Assisted Reproduction: Necessity and Problems -- Why Is It Necessary to Perform a Follow-up of Pregnancies After an ART Procedure? -- Why Do Not All Centres Perform a Follow-up of Pregnancies After an ART Procedure? -- Conclusion -- 2 Incidence of Early Abortions and Ectopic Pregnancies in Assisted Reproduction -- Definitions -- Incidence of Spontaneous Abortions -- Incidence of Ectopic Pregnancies -- Incidence of Heterotopic Pregnancies -- Incidence of Disappearing Gestational Sacs -- Is There a Higher Abortion Risk Following ART? -- 3 Incidence of Chromosomal Abnormalities in Abortions After Assisted Reproduction -- Monosomy -- Trisomy -- Triploidy -- Tetraploidy -- Structural Chromosomal Anomalies -- Mosaics -- Factors that Might Influence the Incidence of Chromosomal Anomalies -- Conclusion -- 4 Assisted Reproduction and Prenatal Diagnosis -- Invasive Prenatal Diagnosis -- Non-invasive Prenatal Diagnosis -- Conclusion -- 5 Obstetric Outcome of Pregnancies After Assisted Reproduction -- Singletons Conceived by ART Versus Spontaneously Conceived Pregnancies -- Singleton Versus Multiple Pregnancies After IVF or IVF/ICSI -- Multiple Pregnancies After ART Versus Spontaneously Conceived Multiple Pregnancies -- Higher Order Multiple Pregnancies Following ART -- Obstetric Outcome of Pregnancies After Cryopreservation -- Conclusion -- 6 Oocyte Donation -- Oocyte Recipients and Donors -- Obstetric Outcome in Oocyte Donation Pregnancies -- The Impact of Age -- Conclusion -- 7 Congenital Malformations After ART -- Congenital Malformations After IVF -- Congenital Malformations After ICSI -- Congenital Malformations After SUZI -- Congenital Malformations After GIFT or Intrauterine Insemination -- Congenital Malformations After Cryopreservation -- An Increased Risk for Certain Malformations -- Conclusion -- 8 Perinatal Outcome and Follow-up of Children Born from ART -- Descriptive Studies Without Control Groups -- Controlled Studies -- Follow-up of Children From Cryopreserved Embryos -- Conclusion -- 9 Development of Children of Lesbian Mothers After Using Assisted Reproduction Techniques -- Development of Children of Lesbian Mothers in General -- Children Conceived Via Donor Insemination by Lesbian Mothers -- Conclusion -- 10 Development of Children and Family Structure After IVF and Gamete Donation -- Children and Their Parents After IVF -- Children and Their Parents After Gamete Donation -- Conclusion -- 11 General Conclusions -- Abbreviation List -- References