The following tables present detail regarding the composition of the Company’s total revenue by product and U.S. versus rest of world, “RoW”:

	Three months ended December 31,
	2018						2017
(In millions)	U.S.		RoW		Total		U.S.		RoW		Total
Molecular diagnostic revenues:
Hereditary Cancer Testing	$	123.4	$	3.3	$	126.7	$	119.6	$	2.6	$	122.2
GeneSight		24.0		—		24.0		31.7		—		31.7
Prenatal		31.2		—		31.2		—		—		—
VectraDA		11.8		—		11.8		11.1		—		11.1
Prolaris		6.1		—		6.1		4.2		—		4.2
EndoPredict		0.4		1.8		2.2		0.1		1.9		2.0
Other		0.7		0.3		1.0		1.7		0.2		1.9
Total molecular diagnostic revenue		197.6		5.4		203.0		168.4		4.7		173.1
Pharmaceutical and clinical service revenue		8.2		5.6		13.8		8.9		5.9		14.8
Total revenue	$	205.8	$	11.0	$	216.8	$	177.3	$	10.6	$	187.9

	Six months ended December 31,
	2018						2017
(In millions)	U.S.		RoW		Total		U.S.		RoW		Total
Molecular diagnostic revenues:
Hereditary Cancer Testing	$	237.0	$	6.1	$	243.1	$	234.2	$	5.0	$	239.2
GeneSight		53.2		—		53.2		60.5		—		60.5
Prenatal		49.3		—		49.3		—		—		—
VectraDA		24.8		—		24.8		25.1		—		25.1
Prolaris		12.3		—		12.3		8.1		—		8.1
EndoPredict		0.7		3.9		4.6		0.1		3.7		3.8
Other		4.4		0.3		4.7		3.5		0.3		3.8
Total molecular diagnostic revenue		381.7		10.3		392.0		331.5		9.0		340.5
Pharmaceutical and clinical service revenue		15.8		11.3		27.1		15.2		11.0		26.2
Total revenue	$	397.5	$	21.6	$	419.1	$	346.7	$	20.0	$	366.7

The Company performs its obligation under a contract with a customer by processing diagnostic tests and communicating the test results to customers, in exchange for consideration from the customer. The Company has the right to bill its customers upon the completion of performance obligations and thus does not record contract assets. Occasionally customers make payments prior to the Company's performance of its contractual obligations. When this occurs, the Company records a contract liability as deferred revenue. A reconciliation of the beginning and ending balances of deferred revenue is shown in the table below:

Myriad generates revenue by performing molecular diagnostic testing and pharmaceutical and clinical services. Revenue from the sale of molecular diagnostic tests and pharmaceutical and clinical services is recorded at the invoiced amount net of any discounts or contractual allowances. The Company has determined that the communication of test results or the completion of clinical and pharmaceutical services indicates transfer of control for revenue recognition purposes.

In accordance with ASU 2014-09, the Company has elected not to disclose the aggregate amount of the transaction price allocated to remaining performance obligations for its contracts that are one year or less, as the revenue is expected to be recognized within the next year. Furthermore, the Company has elected not to disclose the aggregate amount of the transaction price allocated to remaining performance obligations for its agreements wherein the Company’s right to payment is in an amount that directly corresponds with the value of Company’s performance to date. However, periodically the Company enters into arrangements with customers to provide diagnostic testing and/or pharmaceutical and clinical services that may have terms longer than one year and include multiple performance obligations. As of December 31, 2018, the aggregate amount of the transaction price of such contracts that is allocated to the remaining performance obligations is $7.3, $2.9 of which the Company expects to recognize in fiscal 2019.

Significant judgments are required in determining the transaction price and satisfying performance obligations under the new revenue standard. The Company provides discounts such as early payment, self-pay and volume discounts to its customers. In determining the transaction price, Myriad includes an estimate of the expected amount of consideration as revenue. The Company applies this method consistently for similar contracts when estimating the effect of any uncertainty on an amount of variable consideration to which it will be entitled. An estimate of transaction price does not include any estimated amount of variable consideration that are constrained. The Company applies the expected value method for sales where the Company has a large number of contracts with similar characteristics.

In addition, the Company considers all the information (historical, current, and forecast) that is reasonably available to identify possible consideration amounts. In determining the expected value under the new standard, the Company considers the probability of the variable consideration for each possible scenario. The Company also has significant experience with historical discount patterns and uses this experience to estimate transaction prices. In accordance with Accounting Standards Update No. 2016-02, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients (“ASU 2016-12”), the Company has elected to exclude from the measurement of transaction price, all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by the Company from a customer for e.g. sales tax, value added tax etc.

During the three and six months ended December 31, 2018, the Company recognized $3.1 and $3.0 reduction respectively, in revenue for tests in which the performance obligation of delivering the tests results was met in prior periods. The reductions were primarily driven by changes in the estimated transaction price due to contractual adjustments, obtaining updated information from payers and patients that was unknown at the time the performance obligation was met and settlements with third party payers.

The Company has elected to apply the practical expedient related to costs to obtain or fulfill a contract since the amortization period for such costs will be one year or less. Accordingly, no costs incurred to obtain or fulfill a contract have been capitalized. The Company has also elected to apply the practical expedient for not adjusting revenue recognized for the effects of the time value of money. This practical expedient has been elected because the Company collects very little cash from customers under payment terms and vast majority of payments terms have a payback period of less than one year.