Fertility in Turner syndrome
Jacqueline K Hewitt1, Yasmin Jayasinghe, David J Amor
1Department of Endocrinology and Diabetes, Royal Children's Hospital Melbourne, Melbourne, Vic., Australia; Murdoch Childrens Research Institute, Melbourne, Vic., Australia; University of Melbourne, Melbourne, Vic., Australia.
Clinical Endocrinology
|July 13, 2013
Summary
Women with Turner syndrome (TS) face pregnancy risks. Fertility preservation, like ovarian tissue cryopreservation, offers options, but further research is crucial for improved maternal and fetal outcomes in TS patients.
Area of Science:
- Reproductive Endocrinology
- Genetics
- Maternal-Fetal Medicine
Background:
- Turner syndrome (TS) is associated with unique fertility challenges and increased pregnancy risks.
- Assisted reproductive technologies (ART) are increasingly considered for women with TS.
- Existing parenting options for women with TS include adoption, surrogacy, and reproductive assistance.
Purpose of the Study:
- To review current fertility options for women with Turner syndrome.
- To discuss the risks and benefits of homologous and heterologous fertility preservation in TS.
- To highlight the need for further research into improving maternal and fetal outcomes in TS pregnancies.
Main Methods:
- Review of established fertility preservation techniques, including oocyte and ovarian tissue cryopreservation.
- Analysis of heterologous fertility assistance using donor oocytes.
- Examination of homologous fertility preservation, distinguishing between mature oocyte and ovarian tissue cryopreservation.
Main Results:
- Heterologous oocyte donation is an established ART for women with TS.
- Mature oocyte cryopreservation is limited in TS due to early ovarian atresia.
- Ovarian tissue cryopreservation has resulted in over 30 pregnancies, but none in women with TS to date.
Conclusions:
- Homologous fertility preservation in children with TS should be considered only in specialized centers with ethical approval.
- Further research is essential to enhance maternal and fetal outcomes for pregnant women with TS.
- Improved understanding and techniques are needed to optimize fertility options and pregnancy success for women with Turner syndrome.
Related Concept Videos
Meiosis vs. Mitosis
Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
Infertility in Females
Female infertility is defined as the inability to conceive after a year of regular, unprotected intercourse and affects about 10–15% of couples worldwide. The primary cause of female infertility is ovulatory disorders, which hinder the release of eggs. These disorders can be classified as hypothalamic amenorrhea, polycystic ovarian syndrome (PCOS), premature ovarian failure, and hyperprolactinemic anovulation disorders.
Endometriosis, a condition characterized by abnormal growth of endometrial...
Endometriosis, a condition characterized by abnormal growth of endometrial...
Infertility in Males
Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
Nondisjunction
During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
Nondisjunction
Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers. Nondisjunction is common during anaphase I or anaphase II of meiosis. Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold sister...
Nondisjunction
During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.


