Pregnancy registries add to the clinical picture

Pregnancy registries are valuable sources of information. For many drugs, they are the primary source of human pregnancy experience. The new Food and Drug Administration prescription drug information format may increase the amount of information available, at least from registries conducted by drug manufacturers, because they will be required to list all substantive changes made within the year. Although most of the registries use the word “pregnancy,” it is important to note that many also enroll women who took the target drug shortly before conception.

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The strengths of pregnancy registries are their prospective nature and enrollment across a wide geographical area. Typically, two types of pregnancy outcomes are obtained: those with birth defects and those without known birth defects (classified as live births, fetal deaths, and spontaneous abortions).

Registries can identify early signals of teratogenicity, but they have several limitations, including voluntary reporting that results in selection bias, pregnancies lost to follow-up that may have had different outcomes than those with documented outcomes, and a lack of control groups (with some exceptions).

Other limitations are that registry cases are not representative of target populations, and pregnancies lost to follow-up lack details on elective terminations and fetal deaths without birth defects, as well as all spontaneous abortions. Additionally, publication of results may be delayed and does not appear in a peer-reviewed journal.

Since the total number of exposed pregnancies is unknown, registry data cannot be used to calculate prevalence, but can be used to estimate the proportion of birth defects. Some registries also collect data on retrospective reports, which are less representative of the target population because they can be biased toward the reporting of more unusual and severe outcomes. However, they may be helpful in detecting unusual patterns of birth defects.

MothertoBaby Registry

The large Organization of Teratology Information Specialists (OTIS) MothertoBaby registry (877-311-8972) involves four different categories: autoimmune diseases(rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, psoriasis, Crohn’s disease, and multiple sclerosis); asthma; antiviral agents; and vaccines.

Gerald G. Briggs

The drugs for autoimmune diseases are tocilizumab (Actemra), leflunomide (Arava), teriflunomide (Aubagio), certolizumab pegol (Cimzia), etanercept (Enbrel), adalimumab (Humira), abatacept (Orencia), apremilast (Otezla), ustekinumab (Stelara), tofacitinib (Xeljanz), infliximab (Remicade), and methotrexate.

The asthma drugs are formoterol (Foradil, Perforomist, Symbicort, Dulera), albuterol, levalbuterol, metaproterenol, pirbuterol (Maxair), and terbutaline.

The antiviral agents are oseltamivir (Tamiflu) and zanamivir (Relenza).

The vaccines include pertussis (Tdap), seasonal influenza, and meningococcal disease (Menveo). In addition to a control group in each category, a unique aspect of this registry is that many exposed infants will undergo dysmorphology examinations.

Vaccine registries

A second vaccine for meningococcal disease (Menactra) is being studied in the Menactra vaccine Pregnancy Registry (800-822-2463 / www.sanofipasteurpregnancy.com).

Two other registries also include influenza vaccines: Flu vaccine Pregnancy Registry, PPD (Flucelvax) (877-413-4759 / email: NovartisPregnancyregistries@ppdi.com) and the GSK Seasonal Influenza Vaccine Pregnancy Registry, GlaxoSmithKline (888-825-5249 / pregnancyregistry.gsk.com/seasonalinfluenzavaccines.html), which includes the Fluarix and FluLaval vaccines.

Asthma

Women with asthma who are being treated with omalizumab (Xolair) are the target population for the EXPECT Pregnancy Registry (866-496-5247 Option 3 / www.xolairpregnancyregistry.com).

GSK registries

GlaxoSmithKline is also conducting three other registries: the Belimumab (Benlysta) Pregnancy Registry for patients with systemic lupus erythematosus treated with belimumab (877-681-6296 / belimumab.pregnancy@ppdi.com); and the Twinrix Pregnancy Registry for women who have received the Twinrix hepatitis A and B vaccine (888-825-5249).

Atypical antipsychotics

TheNational Pregnancy Registry for Atypical Antipsychotics (866-961-2388 / registry@womens mentalhealth.org) is studying 10 drugs: aripiprazole (Abilify), clozapine (Clozaril), iloperidone (Fanapt), paliperidone (Invega), lurasidone (Latuda), risperidone (Risperdal), asenapine (Saphris), quetiapine (Seroquel), ziprasidone (Geodon), and olanzapine (Zyprexa).

TAPP registry

Acitretin is under study by the Take Action to Prevent Pregnancy (T.A.P.P.) registry (855-850-2138 / www.tevagenerics.com/acitretin).

MPS I registry

The MPS I (Mucopolysaccharidosis I) Registry, Genzyme Corp (617-591-5500 / help@mpsiregistry.com), is studying the use of laronidase (Aldurazyme) for Hurler syndrome, Scheie syndrome, and Hurler-Scheie syndrome.

MPS VI registry

The use of galsulfase (Naglazyme) for Maroteaux-Lamy syndrome during pregnancy is under study by the Mucopolysaccharidosis VI (MPS VI) Clinical Surveillance Program(415-506-6849 or 415-506-6703)

Epilepsy drugs

The Antiepileptic Drug Pregnancy Registry (888-233-2334 / www.aedpregnancyregistry.org) is studying antiepileptic drugs.

Type 2 diabetes

The Exenatide Pregnancy Registry, conducted by INC Research for AstraZeneca (800-633-9081 / www.exenatidepregnancyregistry.com), examines the use of exenatide (Byetta, Bydureon) for the treatment of type 2 diabetes.

Renal transplant

Renal transplant patients exposed to mycophenolate (Cellcept) can be enrolled in the Mycophenolate Pregnancy Registry (800-617-8191) or the National Transplantation Pregnancy Registry (877-955-6877). The NTPR is enrolling renal transplant patients exposed to belatacept (Nulojix).

Cymbalta

The antidepressant duloxetine (Cymbalta), when used for major depressive or generalized anxiety disorders, diabetic peripheral neuropathic pain, or fibromyalgia is being studied by the Cymbalta Pregnancy Registry, INC Research (pregnancyregistries@incresearch.com / www.cymbaltapregancyregistry.com).