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Dive into the research topics where Natalie M. Crawford is active.

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Featured researches published by Natalie M. Crawford.


Obstetrics and Gynecology Clinics of North America | 2015

Age-related Infertility

Natalie M. Crawford; Anne Z. Steiner

Oocyte number and quality decrease with advancing age. Thus, fecundity decreases as age increases, with a more rapid decline after the mid-30s. Patients more than 35 years old should receive prompt evaluation for causes of infertility after no more than 6 months of attempted conception. Patients with abnormal tests of ovarian reserve have a poorer prognosis and may need more expedited and aggressive treatment. Although oocyte donation is the best method to overcome age-related infertility, other treatment options may help women proceed quicker toward pregnancy. Patients at an advanced age should be counseled and evaluated before undergoing infertility treatments.


Human Reproduction | 2017

Infertile women who screen positive for depression are less likely to initiate fertility treatments.

Natalie M. Crawford; H.S. Hoff; Jennifer E. Mersereau

STUDY QUESTION Are infertile women who screen positive for depression less likely to initiate infertility treatments? SUMMARY ANSWER Infertile women who screen positive for depression are less likely to initiate treatment for infertility. WHAT IS ALREADY KNOWN Infertility imposes a psychological burden on many couples. Depression and anxiety have been demonstrated in ~40% of infertile women, which is twice that of fertile women. Further, the psychological burden associated with infertility treatment has been cited as a major factor for discontinuation of infertility care. STUDY DESIGN, SIZE, DURATION Prospective, observational study in a clinical-based cohort of 416 women who completed a questionnaire after the new patient visit, from January 2013 until December 2014 inclusive. PARTICIPANTS/MATERIALS, SETTING, METHODS All new female infertility patients (n = 959) seen between January 2013 and December 2014 at University of North Carolina Fertility received an electronic questionnaire to screen for mental health disorders and to evaluate their perception of mental health disorders on infertility. MAIN RESULTS AND THE ROLE OF CHANCE Of 959 surveys sent, 416 women completed the questionnaire (43%). The prevalence screening positive for depression, using the NIH PROMIS screening tool, was 41%. Sixty-two percent of all women initiated infertility treatment, and of these, 81% did so within 4 months. In multivariate analysis, women who screened positive for depression had 0.55 times the odds of initiating treatment for infertility (95% CI: 0.31-0.95). Similarly, women who screened positive for depression had 0.58 times the odds of initiating infertility treatment within 4 months (95% CI: 0.35-0.97), which was the time of censoring from the most recent patient evaluated. Women who screened positive for depression were less likely to pursue treatment with oral medications or IVF (P = 0.01 and P = 0.03, respectively), as compared to women who did not screen positive for depression. LIMITATIONS, REASONS FOR CAUTION Questionnaire-based evaluations may result in a lower prevalence of psychological disorder as some participants feign emotional well-being. Although we did not identify differences in women who responded to our survey and those who did not, responder bias may still be present. In addition, infertility is a couples disease. However, this study only included psychological evaluation of the female partner. We have no information about the womens previous treatment. WIDER IMPLICATIONS OF THE FINDINGS Screening for depression is important in the infertility patient population, as further evaluation and psychological interventions may improve compliance with fertility treatments, quality of life, and potentially, the overall chance of pregnancy. STUDY FUNDING/COMPETING INTERESTS None.


Reproductive Toxicology | 2017

Effects of perfluorinated chemicals on thyroid function, markers of ovarian reserve, and natural fertility.

Natalie M. Crawford; Suzanne E. Fenton; Mark J. Strynar; Erin P. Hines; David A. Pritchard; Anne Z. Steiner

Perfluorinated chemicals (PFCs) can act as endocrine-disrupting chemicals, but there has been limited study of their effects on ovarian reserve or fecundability. 99 women, 30-44 years old, without infertility were followed until pregnancy. Initially, serum was evaluated for Antimullerian hormone (AMH), thyroid hormones: thyroid stimulating hormone (TSH), thyroxine (T4), free thyroxine (fT4), and triiodothyronine (T3), and PFCs: perfluorooctanoate (PFOA), perfluorooctane sulfonate (PFOS), perfluorononanoic acid (PFNA), and perfluorohexanesulfonic acid (PFHxS). Bivariate analyses assessed the relationship between thyroid hormones, AMH, and PFCs. Fecundability ratios (FR) were determined for each PFC using a discrete time-varying Cox model and a day-specific probability model. PFC levels were positively correlated with each other (r 0.24-0.90), but there was no correlation with TSH (r 0.02-0.15) or AMH (r -0.01 to -0.15). FR point estimates for each PFC were neither strong nor statistically significant. Although increased exposure to PFCs correlates with thyroid hormone levels, there is no significant association with fecundability or ovarian reserve.


Open Journal of Obstetrics and Gynecology | 2016

Mild Stimulation versus Conventional IVF: A Cost-Effectiveness Evaluation

Natalie M. Crawford; Kashika M. Sahay; Jennifer E. Mersereau


Fertility and Sterility | 2017

Prospective evaluation of luteal phase length and natural fertility

Natalie M. Crawford; David A. Pritchard; Amy H. Herring; Anne Z. Steiner


Fertility and Sterility | 2015

Mental health disorders in infertile women: prevalence, perceived effect on fertility, and willingness for treatment for anxiety and depression

H.S. Hoff; Natalie M. Crawford; Jennifer E. Mersereau


Seminars in Reproductive Medicine | 2016

Thyroid Autoimmunity and Reproductive Function.

Natalie M. Crawford; Anne Z. Steiner


Fertility and Sterility | 2016

Prospective evaluation of the impact of intermenstrual bleeding on natural fertility

Natalie M. Crawford; David A. Pritchard; Amy H. Herring; Anne Z. Steiner


Fertility and Sterility | 2015

Impact of perfluorinated chemicals on thyroid hormones, markers of ovarian reserve, and natural fertility

Natalie M. Crawford; Mark J. Strynar; Anne Z. Steiner


Reproductive Biomedicine Online | 2016

Association between progesterone levels at day of trigger and oocyte maturity, fertilization, and pregnancy outcomes after in vitro fertilization

Natalie M. Crawford; A.M. Young; C. Boylan; H.S. Hoff; D.S. Berger

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Anne Z. Steiner

University of North Carolina at Chapel Hill

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H.S. Hoff

University of North Carolina at Chapel Hill

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Jennifer E. Mersereau

University of North Carolina at Chapel Hill

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David A. Pritchard

University of North Carolina at Chapel Hill

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K. Chantala

University of North Carolina at Chapel Hill

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Amy H. Herring

University of North Carolina at Chapel Hill

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D.S. Berger

University of Pennsylvania

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Mark J. Strynar

United States Environmental Protection Agency

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Erin P. Hines

United States Environmental Protection Agency

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Suzanne E. Fenton

National Institutes of Health

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