Если считать по зачатию вот здесь:

Estimated Due Date is 4/13/2016

Gestational Age Today is 10 week(s), 5 day(s) or 2.46 month(s) months.

Date of Conception 7/22/2015

First Fetal Heart Tones by Doppler: 9/23/2015 to 9/30/2015 (11 to 12 w)

End First Trimester: 10/7/2015

Blood Draw for Serum Integrated Screening: 9/16/2015 to 10/13/2015 (10 w to 13 w 6d )

Nuchal Translucency (NT) Ultrasound: 9/25/2015 to 10/16/2015 (11w 2d to 14 w 2d )

Quad Marker Screening: 10/21/2015 to 11/25/2015 (15 w to 20 w)

Best time to evaluate cervical length in patient with risk factors . After :10/28/2015 (16 w)

Best time for routine anatomy ultrasound: 11/11/2015 to 11/25/2015 (18 to 20 w)

2h OGTT in women not previously diagnosed with diabetes: 12/23/2015 to 1/20/2016 (24 w to 28 w)

Anti-D prophylaxis for women who are (RhD) Negative: 1/20/2016 (28 w)

Antepartum Fetal Surveillance in High Risk Patients: 2/17/2016 to 3/2/2016 (32 to 34 w)

Screening for Vaginal and Rectal GBS colonization: 3/9/2016 to 3/23/2016 ( 35 to 37 w)

Elective Delivery May Be Scheduled for Singletons After : 4/6/2016 (39 w)

Если считать по ДПМ там же, то

Estimated Due Date is 4/11/2016

Gestational Age Today is 11 week(s), 0 day(s) or 2.53 month(s) months.

Date of Conception 7/20/2015

First Fetal Heart Tones by Doppler: 9/21/2015 to 9/28/2015 (11 to 12 w)

End First Trimester: 10/5/2015

Blood Draw for Serum Integrated Screening: 9/14/2015 to 10/11/2015 (10 w to 13 w 6d )

Nuchal Translucency (NT) Ultrasound: 9/23/2015 to 10/14/2015 (11w 2d to 14 w 2d )

Quad Marker Screening: 10/19/2015 to 11/23/2015 (15 w to 20 w)

Best time to evaluate cervical length in patient with risk factors . After :10/26/2015 (16 w)

Best time for routine anatomy ultrasound: 11/9/2015 to 11/23/2015 (18 to 20 w)

2h OGTT in women not previously diagnosed with diabetes: 12/21/2015 to 1/18/2016 (24 w to 28 w)

Anti-D prophylaxis for women who are (RhD) Negative: 1/18/2016 (28 w)

Antepartum Fetal Surveillance in High Risk Patients: 2/15/2016 to 2/29/2016 (32 to 34 w)

Screening for Vaginal and Rectal GBS colonization: 3/7/2016 to 3/21/2016 ( 35 to 37 w)

Elective Delivery May Be Scheduled for Singletons After : 4/4/2016 (39 w)